
<PAGE>
                                                                Draft of 8/13/97

                                                                    EXHIBIT 1.02



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                            NORTHERN STATES POWER COMPANY
                 
                          
                              (a Minnesota corporation)

                                           
                            800,000 Shares of Common Stock

                                           
                           INTERNATIONAL PURCHASE AGREEMENT
                                           
                                           
                                           
                                           
                                           
                                           
                                           
                                           
                                           
Dated: __________, 1997


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<PAGE>

                                  TABLE OF CONTENTS
                                           
                                           
SECTION 1.    Representations and Warranties . . . . . . . . . . . . . . 3
  (a)       Representations and Warranties by the Company. . . . . . . . 3
    (i)     Compliance with Registration Requirements. . . . . . . . . . 4
    (ii)    Incorporated Documents . . . . . . . . . . . . . . . . . . . 4
    (iii)   Independent Accountants. . . . . . . . . . . . . . . . . . . 5
    (iv)    Financial Statements . . . . . . . . . . . . . . . . . . . . 5
    (v)     No Material Adverse Change in Business . . . . . . . . . . . 5
    (vi)    Good Standing of the Company . . . . . . . . . . . . . . . . 5
    (vii)   Good Standing of Subsidiaries. . . . . . . . . . . . . . . . 6
    (viii)  Capitalization . . . . . . . . . . . . . . . . . . . . . . . 6
    (ix)    Authorization of Agreement . . . . . . . . . . . . . . . . . 6
    (x)     Authorization and Description of Securities. . . . . . . . . 7
    (xi)    Absence of Defaults and Conflicts. . . . . . . . . . . . . . 7
    (xii)   Absence of Labor Dispute . . . . . . . . . . . . . . . . . . 8
    (xiii)  Absence of Proceedings . . . . . . . . . . . . . . . . . . . 8
    (xiv)   Accuracy of Exhibits . . . . . . . . . . . . . . . . . . . . 8
    (xv)    Possession of Intellectual Property. . . . . . . . . . . . . 8
    (xvi)   Absence of Further Requirements. . . . . . . . . . . . . . . 9
    (xvii)  Possession of Licenses and Permits . . . . . . . . . . . . . 9
    (xviii) Title to Property. . . . . . . . . . . . . . . . . . . . . . 9
    (xix)   Compliance with Cuba Act . . . . . . . . . . . . . . . . . .10
    (xx)    Investment Company Act . . . . . . . . . . . . . . . . . . .10
    (xxi)   Environmental Laws . . . . . . . . . . . . . . . . . . . . .10
  (b)       Officer's Certificates . . . . . . . . . . . . . . . . . . .10
SECTION 2.  Sale and Delivery to International Managers; Closing . . . .11
  (a)       International Initial Securities . . . . . . . . . . . . . .11
  (b)       International Option Securities. . . . . . . . . . . . . . .11
  (c)       Payment. . . . . . . . . . . . . . . . . . . . . . . . . . .11
  (d)       Denominations; Registration. . . . . . . . . . . . . . . . .12
SECTION 3.  Covenants of the Company . . . . . . . . . . . . . . . . . .12
  (a)       Compliance with Securities Regulations and
             Commission Requests . . . . . . . . . . . . . . . . . . . .12
  (b)       Filing of Amendments . . . . . . . . . . . . . . . . . . . .13
  (c)       Delivery of Registration Statements. . . . . . . . . . . . .13
  (d)       Delivery of Prospectuses . . . . . . . . . . . . . . . . . .13
  (e)       Continued Compliance with Securities Laws. . . . . . . . . .14
  (f)       Blue Sky Qualifications. . . . . . . . . . . . . . . . . . .14
  (g)       Rule 158 . . . . . . . . . . . . . . . . . . . . . . . . . .14
  (h)       Use of Proceeds. . . . . . . . . . . . . . . . . . . . . . .15
  (i)       Listing. . . . . . . . . . . . . . . . . . . . . . . . . . .15
  (j)       Restriction on Sale of Securities. . . . . . . . . . . . . .15
  (k)       Reporting Requirements . . . . . . . . . . . . . . . . . . .15
SECTION 4.  Payment of Expenses. . . . . . . . . . . . . . . . . . . . .15

                                          i
<PAGE>

  (a)       Expenses . . . . . . . . . . . . . . . . . . . . . . . . . .15
  (b)       Termination of Agreement . . . . . . . . . . . . . . . . . .16
SECTION 5.  Conditions of International Managers' Obligations. . . . . .16
  (a)       Effectiveness of Registration Statement. . . . . . . . . . .16
  (b)       Opinion of Counsel for Company . . . . . . . . . . . . . . .16
  (c)       Opinion of Counsel for International Managers. . . . . . . .16
  (d)       Officers' Certificate. . . . . . . . . . . . . . . . . . . .17
  (e)       Accountant's Comfort Letter. . . . . . . . . . . . . . . . .17
  (f)       Bring-down Comfort Letter. . . . . . . . . . . . . . . . . .17
  (g)       Approval of Listing. . . . . . . . . . . . . . . . . . . . .18
  (h)       Purchase of U.S. Initial Securities. . . . . . . . . . . . .18
  (i)       Conditions to Purchase of International Option Securities. .18
    (i)     Officers' Certificate. . . . . . . . . . . . . . . . . . . .18
    (ii)    Opinion of Counsel for Company . . . . . . . . . . . . . . .18
    (iii)   Opinion of Counsel for International Managers. . . . . . . .18
    (iv)    Bring-down Comfort Letter. . . . . . . . . . . . . . . . . .18
  (j)       Additional Documents . . . . . . . . . . . . . . . . . . . .18
  (k)       Termination of Agreement . . . . . . . . . . . . . . . . . .19
SECTION 6.  Indemnification. . . . . . . . . . . . . . . . . . . . . . .19
  (a)       Indemnification of International Managers. . . . . . . . . .19
  (b)       Indemnification of Company, Directors and Officers . . . . .20
  (c)       Actions against Parties; Notification. . . . . . . . . . . .20
  (d)       Settlement without Consent if Failure to Reimburse . . . . .21
SECTION 7.  Contribution . . . . . . . . . . . . . . . . . . . . . . . .21
SECTION 8.  Representations, Warranties and Agreements to Survive 
             Delivery. . . . . . . . . . . . . . . . . . . . . . . . . .23
SECTION 9.  Termination of Agreement . . . . . . . . . . . . . . . . . .23
  (a)       Termination; General . . . . . . . . . . . . . . . . . . . .23
  (b)       Liabilities. . . . . . . . . . . . . . . . . . . . . . . . .23
SECTION 10. Default by One or More of the International Managers . . . .23
SECTION 11. Notices. . . . . . . . . . . . . . . . . . . . . . . . . . .24
SECTION 12. Parties. . . . . . . . . . . . . . . . . . . . . . . . . . .24
SECTION 13. GOVERNING LAW AND TIME . . . . . . . . . . . . . . . . . . .25
SECTION 14. Effect of Headings . . . . . . . . . . . . . . . . . . . . .26

                                          ii

<PAGE>

                                                                Draft of 8/13/97
                                           
                            NORTHERN STATES POWER COMPANY
                              (a Minnesota corporation)
                            800,000 Shares of Common Stock
                             (Par Value $2.50 Per Share)
                           INTERNATIONAL PURCHASE AGREEMENT
                           --------------------------------

                                                                __________, 1997

MERRILL LYNCH INTERNATIONAL
GOLDMAN, SACHS INTERNATIONAL
SALOMON BROTHERS INTERNATIONAL LIMITED
DAIN BOSWORTH INCORPORATED
PIPER JAFFRAY INC.
as Lead Managers of the several International Managers 
c/o Merrill Lynch International
Ropemaker Place
25 Ropemaker Street
London EC2Y 9LY
England

Ladies and Gentlemen:

    Northern States Power Company, a Minnesota corporation (the "Company"),
confirms its agreement with Merrill Lynch International and each of the other
International Managers named in Schedule A hereto (collectively, the
"International Managers," which term shall also include any underwriter
substituted as hereinafter provided in Section 10 hereof), for whom Merrill
Lynch International, Goldman, Sachs International, Salomon Brothers
International Limited, Dain Bosworth Incorporated and Piper Jaffray Inc. are
acting as representatives (in such capacity, the "Lead Managers"), with respect
to (i) the sale by the Company and the purchase by the International Managers,
acting severally and not jointly, of the respective numbers of shares of Common
Stock, par value $2.50 per share, of the Company ("Common Stock") set forth in
Schedule A hereto and (ii) the grant by the Company to the International
Managers, acting severally and not jointly, of the option described in Section
2(b) hereof to purchase all or any part of 120,000 additional shares of Common
Stock to cover over-allotments, if any. The aforesaid 800,000 shares of Common
Stock (the "International Initial Securities") to be purchased by the
International Managers and all or any part of the 120,000 shares of Common Stock
subject to the option described in Section 2(b) hereof (the "International
Option Securities") are hereinafter called, collectively, the "International
Securities."


                                          1
<PAGE>

    It is understood that the Company is concurrently entering into an
agreement dated the date hereof (the "U.S. Purchase Agreement") providing for
the offering by the Company of an aggregate of 3,200,000 shares of Common Stock
(the "U.S. Initial Securities") through arrangements with certain underwriters
in the United States and Canada (the "U.S. Underwriters") for which Merrill
Lynch & Co., Merrill Lynch, Pierce, Fenner & Smith Incorporated, Salomon
Brothers Inc., Goldman, Sachs International, Dain Bosworth and Piper Jaffray are
acting as representatives (the "Lead Managers") and the grant by the Company to
the U.S. Underwriters, acting severally and not jointly, of an option to
purchase all or any part of the 480,000 additional shares of Common Stock solely
to cover overallotments, if any (the "U.S. Option Securities" and, together with
the International Option Securities, the "Option Securities"). The U.S. Initial
Securities and the U.S. Option Securities are hereinafter called the "U.S.
Securities." It is understood that the Company is not obligated to sell, and the
International Managers are not obligated to purchase, any International Initial
Securities unless all of the U.S. Initial Securities are contemporaneously
purchased by the U.S. Underwriters.

    The International Managers and the International Managers are hereinafter
collectively called the "Underwriters", the U.S. Initial Securities and the
International Initial Securities are hereinafter collectively called the
"Initial Securities", and the International Securities and the International
Securities are hereinafter collectively called the "Securities."

    The Underwriters will concurrently enter into an Intersyndicate Agreement
of even date herewith (the "Intersyndicate Agreement") providing for the
coordination of certain transactions among the Underwriters under the direction
of Merrill Lynch.& Co., Merrill Lynch, Pierce, Fenner & Smith Incorporated (in
such capacity, the "Global Coordinator").

    The Company understands that the International Managers propose to make a
public offering of the International Securities as soon as the Lead Managers
deem advisable after this Agreement has been executed and delivered.

The Company has filed with the Securities and Exchange Commission (the
"Commission") a registration statement on Form S-3 (No. 333-__) covering the
registration of the Securities under the Securities Act of 1933, as amended (the
"1933 Act"), including the related preliminary prospectus or prospectuses. Two
forms of prospectus are to be used in connection with the offering and sale of
the Securities: one relating to the International Securities (the "Form of U.S.
Prospectus") and one relating to the International Securities (the "Form of
International Prospectus"). The Form of International Prospectus will be
identical to the Form of U.S. Prospectus, except for the front cover, inside
front cover and back cover page and the information under the caption
"Underwriting." Promptly after execution and delivery of this Agreement, the
Company will either (i) prepare and file a Form of U.S. Prospectus and a Form of
International Prospectus in accordance with the provisions of Rule 430A ("Rule
430A") of the rules and regulations of the Commission under the 1933 Act (the
"1933 Act Regulations") and paragraph (b) of Rule 424 ("Rule 424(b)") of the
1933 Act Regulations or (ii) if the Company has elected to rely upon Rule 434
("Rule 434") of the 1933 Act Regulations, prepare and file term sheets (a "Term
Sheet") in accordance with the provisions of Rule 434 and Rule


                                          2
<PAGE>

424(b). The information included in each such prospectus or in each such
Term Sheet, as the case may be, that was omitted from such registration
statement at the time it became effective but that is deemed to be part of such
registration statement at the time it became effective (a) pursuant to paragraph
(b) of Rule 430A is referred to as "Rule 430A Information" or (b) pursuant to
paragraph (d) of Rule 434 is referred to as "Rule 434 Information." Each
prospectus used before such registration statement became effective, and any
prospectus that omitted, as applicable, the Rule 430A Information or the Rule
434 Information, that was used after such effectiveness and prior to the
execution and delivery of this Agreement, is herein called a "preliminary
prospectus." Such registration statement, including the exhibits thereto,
schedules thereto, if any, and the documents incorporated by reference therein
pursuant to Item 12 of Form S-3 under the 1933 Act, at the time it became
effective and including the Rule 430A Information and the Rule 434 Information,
as applicable, is herein called the "Registration Statement." Any registration
statement filed pursuant to Rule 462(b) of the 1933 Act Regulations is herein
referred to as the "Rule 462(b) Registration Statement," and after such filing
the term "Registration Statement" shall include the Rule 462(b) Registration
Statement. The final Form of U.S. Prospectus and the final Form of International
Prospectus, including the documents incorporated by reference therein pursuant
to Item 12 of Form S-3 under the 1933 Act, in the form first furnished to the
Underwriters for use in connection with the offering of the Securities is herein
called the "U.S. Prospectus" and the "International Prospectus," respectively,
and collectively, the "Prospectuses" "Prospectus." If Rule 434 is relied on, the
term terms "U.S. Prospectus" and "International Prospectus" shall refer to the
preliminary U.S. Prospectus dated __________, 1997 and preliminary International
Prospectus dated __________, 1997, respectively, each together with the
applicable Term Sheet and all references in this Agreement to the date of the
Prospectus shall mean the date of the applicable Term Sheet. For purposes of
this Agreement, all references to the Registration Statement, any preliminary
prospectus, the Prospectus, the U.S. Prospectus, the International Prospectus or
any Term Sheet or any amendment or supplement to any of the foregoing shall be
deemed to include the copy filed with the Commission pursuant to its Electronic
Data Gathering, Analysis and Retrieval system ("EDGAR").

    All references in this Agreement to financial statements and schedules and
other information which is "contained," "included" or "stated" in the
Registration Statement, any preliminary prospectus (including the Form of U.S.
Prospectus and Form of International Prospectus) or the Prospectuses (or other
references of like import) shall be deemed to mean and include all such
financial statements and schedules and other information which is incorporated
by reference in the Registration Statement, any preliminary prospectuses or the
Prospectuses, as the case may be; and all references in this Agreement to
amendments or supplements to the Registration Statement, any preliminary
prospectus or the Prospectuses shall be deemed to mean and include the filing of
any document under the Securities Exchange Act of 1934 (the "1934 Act") which is
incorporated by reference in the Registration Statement, such preliminary
prospectus or the Prospectuses, as the case may be.


                                          3
<PAGE>

SECTION 1.    REPRESENTATIONS AND WARRANTIES.

    (a)  Representations and Warranties by the Company. The Company represents
    and warrants to each International Manager as of the date hereof, as of the
    Closing Time referred to in Section 2(c) hereof, and as of each Date of
    Delivery (if any) referred to in Section 2(b) hereof, and agrees with each
    International Manager, as follows:

         (i)  COMPLIANCE WITH REGISTRATION REQUIREMENTS. The Company meets the
         requirements for use of Form S-3 under the 1933 Act.  Each of the
         Registration Statement and any Rule 462(b) Registration Statement has
         become effective under the 1933 Act and no stop order suspending the
         effectiveness of the Registration Statement or any Rule 462(b)
         Registration Statement has been issued under the 1933 Act and no
         proceedings for that purpose have been instituted or are pending or,
         to the knowledge of the Company, are contemplated by the Commission,
         and any request on the part of the Commission for additional
         information has been complied with.

    At the respective times the Registration Statement, any Rule 462(b)
Registration Statement and any post-effective amendments thereto became
effective and at the Closing Time (and, if any International Option Securities
are purchased, at the Date of Delivery), the Registration Statement, the Rule
462(b) Registration Statement and any amendments and supplements thereto
complied and will comply in all material respects with the requirements of the
1933 Act and the 1933 Act Regulations and did not and will not contain an untrue
statement of a material fact or omit to state a material fact required to be
stated therein or necessary to make the statements therein not misleading.
Neither the Prospectuses nor any amendments or supplements thereto, at the time
the Prospectuses or any such amendment or supplement was issued and at the
Closing Time (and, if any International Option Securities are purchased, at the
Date of Delivery), included or will include an untrue statement of a material
fact or omitted or will omit to state a material fact necessary in order to make
the statements therein, in the light of the circumstances under which they were
made, not misleading. If Rule 434 is used, the Company will comply with the
requirements of Rule 434. The representations and warranties in this subsection
shall not apply to statements in or omissions from the Registration Statement or
U.S. Prospectus made in reliance upon and in conformity with information
furnished to the Company in writing by any International Manager through Merrill
Lynch International expressly for use in the Registration Statement or
International Prospectus. 

Each preliminary prospectus and the prospectuses filed as part of the
Registration Statement as originally filed or as part of any amendment thereto,
or filed pursuant to Rule 424 under the 1933 Act, complied when so filed in all
material respects with the 1933 Act Regulations and each preliminary prospectus
and the Prospectuses delivered to the Underwriters for use in connection with
the offering of the Securities was identical to the electronically transmitted
copies thereof filed with the Commission pursuant to EDGAR, except to the extent
permitted by Regulation S-T.


                                          4
<PAGE>

         (ii) INCORPORATED DOCUMENTS. The documents incorporated or deemed to
         be incorporated by reference in the Registration Statement and the
         Prospectuses, at the time they were or hereafter are filed with the
         Commission, complied and will comply in all material respects with the
         requirements of the 1934 Act and the rules and regulations of the
         Commission thereunder (the "1934 Act Regulations"), and, when read
         together with the other information in the Prospectuses, at the time
         the Registration Statement became effective, at the time the
         Prospectuses were issued and at the Closing Time (and, if any
         International Option Securities are purchased, at the Date of
         Delivery), did not and will not contain an untrue statement of a
         material fact or omit to state a material fact required to be stated
         therein or necessary to make the statements therein not misleading. 

         (iii) INDEPENDENT ACCOUNTANTS. The accountants who certified the
         financial statements and supporting schedules included in the
         Registration Statement are independent public accountants as required
         by the 1933 Act and the 1933 Act Regulations. 

         (iv) FINANCIAL STATEMENTS. The financial statements included in the
         Registration Statement and the Prospectuses, together with the related
         schedules and notes, present fairly the financial position of the
         Company and its consolidated subsidiaries at the dates indicated and
         the statement of operations, stockholders' equity and cash flows of
         the Company and its consolidated subsidiaries for the periods
         specified; said financial statements have been prepared in conformity
         with generally accepted accounting principles ("GAAP") applied on a
         consistent basis throughout the periods involved. The supporting
         schedules, if any, included in the Registration Statement present
         fairly in accordance with GAAP the information required to be stated
         therein. The selected financial data and the summary financial
         information included in the Prospectuses present fairly the
         information shown therein and have been compiled on a basis consistent
         with that of the audited financial statements included in the
         Registration Statement. 

         (v)  NO MATERIAL ADVERSE CHANGE IN BUSINESS. Since the respective
         dates as of which information is given in the Registration Statement
         and the Prospectuses, except as otherwise stated therein, (A) there
         has been no material adverse change in the condition, financial or
         otherwise, or in the earnings, business affairs or business prospects
         of the Company and its subsidiaries considered as one enterprise,
         whether or not arising in the ordinary course of business (a "Material
         Adverse Effect"), (B) there have been no transactions entered into by
         the Company or any of its subsidiaries, other than those in the
         ordinary course of business, which are material with respect to the
         Company and its subsidiaries considered as one enterprise, and (C)
         except for regular dividends on the Common Stock and the Company's
         preferred stock in amounts per share that are consistent 


                                          5
<PAGE>

         with past practice, there has been no dividend or distribution of any
         kind declared, paid or made by the Company on any class of its capital
         stock. 

         (vi) GOOD STANDING OF THE COMPANY. The Company has been duly organized
         and is validly existing as a corporation in good standing under the
         laws of the State of Minnesota and has corporate power and authority
         to own, lease and operate its properties and to conduct its business
         as described in the Prospectuses and to enter into and perform its
         obligations under this Agreement and the U.S. Purchase Agreement; and
         the Company is duly qualified as a foreign corporation to transact
         business and is in good standing in each other jurisdiction in which
         such qualification is required, whether by reason of the ownership or
         leasing or property or the conduct of business, except where the
         failure so to qualify or be in good standing would not result in a
         Material Adverse Effect. 

         (vii) GOOD STANDING OF SUBSIDIARIES. Each subsidiary of the Company
         named in Exhibit 21.01 to the Company's Annual Report on Form 10-K for
         the year ended December 31, 1996 ("Significant Subsidiary") has been
         duly organized and is validly existing as a corporation in good
         standing under the laws of the jurisdiction of its incorporation, has
         corporate power and authority to own, lease and operate its properties
         and to conduct its business as described in the Prospectuses and is
         duly qualified as a foreign corporation to transact business and is in
         good standing in each jurisdiction in which such qualification is
         required, whether by reason of the ownership or leasing of property or
         the conduct of business, except where the failure so to qualify or to
         be in good standing would not result in a Material Adverse Effect;
         except as otherwise disclosed in the Registration Statement, all of
         the issued and outstanding capital stock of each such Significant
         Subsidiary has been duly authorized and validly issued, is fully paid
         and non-assessable and is owned by the Company, directly or through
         subsidiaries, free and clear of any security interest, mortgage,
         pledge, lien, encumbrance, claim or equity; none of the outstanding
         shares of capital stock of any Significant Subsidiary was issued in
         violation of the preemptive or similar rights of any securityholder of
         such Subsidiary. The only subsidiaries of the Company are (a) the
         subsidiaries listed on Exhibit 21.01 to the Company's Annual Report on
         Form 10-K for the year ended December 31, 1996 and (b) certain other
         subsidiaries which, considered in the aggregate as a single
         Subsidiary, do not constitute a "significant subsidiary" as defined in
         Rule 1-02 of Regulation S-X. 

         (viii) CAPITALIZATION. The authorized, issued and outstanding capital
         stock of the Company is as set forth in the Prospectuses in the column
         entitled "Actual" under the caption "Capitalization" (except for
         subsequent issuances, if any, pursuant to this Agreement, pursuant to
         reservations, agreements or employee benefit plans referred to in the
         Prospectuses or pursuant to the exercise of convertible securities or
         options referred to in the Prospectuses). The shares of issued and
         outstanding 


                                          6
<PAGE>

         capital stock have been duly authorized and validly issued and are
         fully paid and non-assessable; none of the outstanding shares of
         capital stock was issued in violation of the preemptive or other
         similar rights of any securityholder of the Company. 

         (ix) AUTHORIZATION OF AGREEMENT. This Agreement and the U.S. Purchase
         Agreement have been duly authorized, executed and delivered by the
         Company. 

         (x)  AUTHORIZATION AND DESCRIPTION OF SECURITIES. The Securities have
         been duly authorized for issuance and sale to the U.S. Underwriters
         pursuant to this Agreement and to the International Managers pursuant
         to the U.S. Purchase Agreement and, when issued and delivered by the
         Company pursuant to this Agreement and the U.S. Purchase Agreement,
         respectively, against payment of the consideration set forth herein,
         will be validly issued and fully paid and non-assessable; the Common
         Stock conforms to all statements relating thereto contained in the
         Prospectuses and such description conforms to the rights set forth in
         the instruments defining the same; no holder of the Securities will be
         subject to personal liability by reason of being such a holder; and
         the issuance of the Securities is not subject to the preemptive or
         other similar rights of any securityholder of the Company. 

         (xi) ABSENCE OF DEFAULTS AND CONFLICTS. Neither the Company nor any 
         of its subsidiaries is in violation of its charter or by-laws or,  
         except as disclosed in the Registration Statement, in default in the 
         performance or observance of any obligation, agreement, covenant or 
         condition contained in any contract, indenture, mortgage, deed of 
         trust, loan or credit agreement, note, lease or other agreement or 
         instrument to which the Company or any of its subsidiaries is a 
         party or by which it or any of them may be bound, or to which any of 
         the property or assets of the Company or any subsidiary is subject 
         (collectively, "Agreements and Instruments") except for such 
         defaults that would not result in a Material Adverse Effect; and the 
         execution, delivery and performance of this Agreement and the U.S. 
         Purchase Agreement and the consummation of the transactions 
         contemplated herein and therein and in the Registration Statement 
         (including the issuance and sale of the Securities and the use of 
         the proceeds from the sale of the Securities as described in the 
         Prospectuses under the caption "Use of Proceeds") and compliance by 
         the Company with its obligations hereunder and thereunder have been 
         duly authorized by all necessary corporate action and do not and 
         will not, whether with or without the giving of notice or passage of 
         time or both, conflict with or constitute a breach of, or default or 
         Repayment Event (as defined below) under, or result in the creation 
         or imposition of any lien, charge or encumbrance upon any property 
         or assets of the Company or any subsidiary pursuant to, the 
         Agreements and Instruments (except for such conflicts, breaches or 
         defaults or liens, charges or encumbrances that would not result in 
         a Material Adverse Effect), nor will such action result in any 

                                          7
<PAGE>

         violation of the provisions of the charter or by-laws of the Company
         or any subsidiary or any applicable law, statute, rule, regulation,
         judgment, order, writ or decree of any government, government
         instrumentality or court, domestic or foreign, having jurisdiction
         over the Company or any subsidiary or any of their assets, properties
         or operations. As used herein, a "Repayment Event" means any event or
         condition which gives the holder of any note, debenture or other
         evidence of indebtedness (or any person acting on such holder's
         behalf) the right to require the repurchase, redemption or repayment
         of all or a portion of such indebtedness by the Company or any
         subsidiary. 

         (xii) ABSENCE OF LABOR DISPUTE. No labor dispute with the employees of
         the Company or any subsidiary exists or, to the knowledge of the
         Company, is imminent, and the Company is not aware of any existing or
         imminent labor disturbance by the employees of any of its or any
         subsidiary's principal suppliers, manufacturers, customers or
         contractors, which, in either case, may reasonably be expected to
         result in a Material Adverse Effect.

         (xiii) ABSENCE OF PROCEEDINGS. There is no action, suit, proceeding,
         inquiry or investigation before or brought by any court or
         governmental agency or body, domestic or foreign, now pending, or, to
         the knowledge of the Company, threatened, against or affecting the
         Company or any subsidiary, which is required to be disclosed in the
         Registration Statement (other than as disclosed therein), or which
         might reasonably be expected to result in a Material Adverse Effect,
         or which might reasonably be expected to materially or adversely
         affect the properties or assets thereof or the consummation of the
         transactions contemplated in this Agreement or the performance by the
         Company of its obligations hereunder; the aggregate of all pending
         legal or governmental proceedings to which the Company or any
         subsidiary is a party or of which any of their respective property or
         assets is the subject which are not described in the Registration
         Statement, including ordinary routine litigation incidental to the
         business, could not reasonably be expected to result in a Material
         Adverse Effect.

         (xiv) ACCURACY OF EXHIBITS. There are no contracts or documents which
         are required in the Registration Statement, the Prospectuses or the
         documents incorporated by reference therein or to be filed as exhibits
         thereto which have not been so described and filed as required.

         (xv) POSSESSION OF INTELLECTUAL PROPERTY. The Company and its
         subsidiaries own or possess, or can acquire on reasonable terms,
         adequate patents, patent rights, licenses, inventions, copyrights,
         know-how (including trade secrets and other unpatented and/or
         unpatentable proprietary or confidential information, systems or
         procedures), trademarks, service marks, trade names or other
         intellectual property (collectively, "Intellectual Property")
         necessary to carry on 


                                          8
<PAGE>

         the business now operated by them, and neither the Company nor any of
         its subsidiaries has received any notice or is otherwise aware of any
         infringement of or conflict with asserted rights of others with
         respect to any Intellectual Property or of any facts or circumstances
         which would render any Intellectual Property invalid or inadequate to
         protect the interest of the Company or any of its subsidiaries
         therein, and which infringement or conflict (if the subject of any
         unfavorable decision, ruling or finding) or invalidity or inadequacy,
         singly or in the aggregate, would result in a Material Adverse Effect.

         (xvi) ABSENCE OF FURTHER REQUIREMENTS. The Minnesota Public Utilities
         Commission has issued its order approving capital structure which
         order authorizes the issuance of the Securities, and no other filing
         with, or authorization, approval, consent, license, order,
         registration, qualification or decree of, any court or governmental
         authority or agency is necessary or required for the performance by
         the Company of its obligations under this Agreement and the U.S.
         Purchase Agreement, in connection with the offering, issuance or sale
         of the Securities hereunder and thereunder or the consummation of the
         transactions contemplated by this Agreement and the U.S. Purchase
         Agreement, except such as have been already obtained or as may be
         required under the 1933 Act or the 1933 Act Regulations or foreign or
         state securities laws.

         (xvii) POSSESSION OF LICENSES AND PERMITS. The Company and its
         subsidiaries possess such permits, licenses, approvals, consents and
         other authorizations (collectively, "Governmental Licenses") issued by
         the appropriate federal, state, local or foreign regulatory agencies
         or bodies necessary to conduct the business now operated by them; the
         Company and its subsidiaries are in compliance with the terms and
         conditions of all such Governmental Licenses, except where the failure
         so to comply would not, singly or in the aggregate, have a Material
         Adverse Effect; all of the Governmental Licenses are valid and in full
         force and effect, except when the invalidity of such Governmental
         Licenses or the failure of such Governmental Licenses to be in full
         force and effect would not have a Material Adverse Effect; and neither
         the Company nor any of its subsidiaries has received any notice of
         proceedings relating to the revocation or modification of any such
         Governmental Licenses which, singly or in the aggregate, if the
         subject of an unfavorable decision, ruling or finding, would result in
         a Material Adverse Effect.

         (xviii) TITLE TO PROPERTY. The Company has good and valid title to all
         real and fixed property and leasehold rights owned by it, subject only
         to taxes and assessments not yet delinquent; the lien of the Company's
         Trust Indenture, dated as of February 1, 1937, as supplemented and
         amended (the "Indenture"); as to parts of the Company's property,
         certain easements, conditions, restrictions, 


                                          9
<PAGE>

         leases, and similar encumbrances which do not affect the Company's use
         of such property in the usual course of its business. and certain
         minor defects in titles which are not material, and defects in titles
         to certain properties which are not essential to the Company's
         business; and mechanics' lien claims being contested or not of record
         or for the satisfaction or discharge of which adequate provision has
         been made by the Company pursuant to the Indenture; and any real
         property and buildings held under lease by the Company is held by it
         under valid, subsisting and enforceable leases with such exceptions as
         are not material and do not interfere with the use made and proposed
         to be made of such property and buildings by the Company.

         (xix) COMPLIANCE WITH CUBA ACT. The Company has complied with, and is
         and will be in compliance with, the provisions of that certain Florida
         act relating to disclosure of doing business with Cuba, codified as
         Section 517.075 of the Florida statutes, and the rules and regulations
         thereunder (collectively, the "Cuba Act") or is exempt therefrom.

         (xx) INVESTMENT COMPANY ACT. The Company is not, and upon the issuance
         and sale of the Securities as herein contemplated and the application
         of the net proceeds therefrom as described in the Prospectus will not
         be, an "investment company" or an entity "controlled" by an
         "investment company" as such terms are defined in the Investment
         Company Act of 1940, as amended (the "1940 Act").

         (xxi) ENVIRONMENTAL LAWS. Except as described in the Registration
         Statement and except as would not, singly or in the aggregate, result
         in a Material Adverse Effect, (A) neither the Company nor any of its
         subsidiaries is in violation of any federal, state, local or foreign
         statute, law, rule, regulation, ordinance, code, policy or rule of
         common law or any judicial or administrative interpretation thereof,
         including any judicial or administrative order, consent, decree or
         judgment, relating to pollution or protection of human health, the
         environment (including, without limitation, ambient air, surface
         water, groundwater, land surface or subsurface strata) or wildlife,
         including, without limitation, laws and regulations relating to the
         release or threatened release of chemicals, pollutants, contaminants,
         wastes, toxic substances, hazardous substances, petroleum or petroleum
         products (collectively, "Hazardous Materials") or to the manufacture,
         processing, distribution, use, treatment, storage, disposal, transport
         or handling of Hazardous Materials (collectively, "Environmental
         Laws"), (B) the Company and its subsidiaries have all permits,
         authorizations and approvals required under any applicable
         Environmental Laws and are each in compliance with their requirements,
         (C) there are no pending or threatened administrative, regulatory or
         judicial actions, suits, demands, demand letters, claims, liens,
         notices of noncompliance or violation, investigation or proceeding
         relating to any 


                                          10
<PAGE>

         Environmental Law against the Company or any of its subsidiaries and
         (D) there are no events or circumstances that might reasonably be
         expected to form the basis of an order for clean-up or remediation, or
         an action, suit or proceeding by any private party or governmental
         body or agency, against or affecting the Company or any of its
         subsidiaries relating to Hazardous Materials or any Environmental
         Laws.

    (b)  OFFICER'S CERTIFICATES. Any certificate signed by any officer of the
    Company or any of its subsidiaries and delivered to the International
    Managers or to counsel for the International Managers shall be deemed a
    representation and warranty by the Company to each International Manager as
    to the matters covered thereby.

SECTION 2.    SALE AND DELIVERY TO INTERNATIONAL MANAGERS; CLOSING.

    (a)  INTERNATIONAL INITIAL SECURITIES. On the basis of the representations
    and warranties herein contained and subject to the terms and conditions
    herein set forth, the Company agrees to sell to each International Manager
    and each International Manager, severally and not jointly, agrees to
    purchase from the Company, at the price per share set forth in Schedule B,
    the number of International Initial Securities set forth in Schedule A
    opposite the name of such International Manager, plus any additional number
    of International Initial Securities which such International Manager may
    become obligated to purchase pursuant to the provisions of Section 10
    hereof, subject to such adjustments among the International Managers as the
    representatives in their sole discretion shall make to eliminate any sales
    or purchases of fractional securities.

    (b)  INTERNATIONAL OPTION SECURITIES. In addition, on the basis of the
    representations and warranties herein contained and subject to the terms
    and conditions herein set forth, the Company hereby grants an option to the
    International Managers, severally and not jointly, to purchase up to an
    additional 120,000 shares of Common Stock, at the price per share set forth
    in Schedule B, less an amount per share equal to any dividends or
    distributions declared by the Company and payable on the International
    Initial Securities but not payable on the International Option Securities.
    The option hereby granted will expire 30 days after the date hereof and may
    be exercised in whole or in part from time to time only for the purpose of
    covering over-allotments which may be made in connection with the offering
    and distribution of the International Initial Securities upon notice by he
    Global Coordinator to the Company setting forth the number of International
    Option Securities as to which the several International Managers are then
    exercising the option and the time and date of payment and delivery for
    such International Option Securities. Any such time and date of delivery (a
    "Date of Delivery") shall be determined by the Global Coordinator, but
    shall not be later than seven full business days after the exercise of said
    option, nor in any event prior to the Closing Time, as hereinafter defined.
    If the option is exercised as to all or any portion of the International
    Option Securities, each of the International Managers, acting severally and
    not jointly, will purchase that proportion 


                                          11
<PAGE>

    of the total number of International Option Securities then being purchased
    which the number of International Initial Securities set forth in Schedule
    A opposite the name of such International Manager bears to the total number
    of International Initial Securities, subject in each case to such
    adjustments as the Lead Managers in their discretion shall make to
    eliminate any sales or purchases of fractional shares.

    (c)  PAYMENT. Payment of the purchase price for, and delivery of
    certificates for, the International Initial Securities shall be made at the
    offices of Gardner, Carton & Douglas, 321 N. Clark Street, Chicago,
    Illinois 60610, or at such other place as shall be agreed upon by the
    Global Coordinator and the Company at 9:00 A.M. (Central time) on the third
    (fourth, if the pricing occurs after 4:30 P.M. (Eastern time) on any given
    day) business day after the date hereof (unless postponed in accordance
    with the provisions of Section 10), or such other time not later than ten
    business days after such date as shall be agreed upon by the Global
    Coordinator and the Company (such time and date of payment and delivery
    being herein called "Closing Time."

    In addition, in the event that any or all of the International Option
Securities are purchased by the International Managers, payment of the purchase
price for, and delivery of certificates for, such International Option
Securities shall be made at the above-mentioned offices, or at such other place
as shall be agreed upon by the Lead Managers and the Company, on each Date of
Delivery as specified in the notice from the Global Coordinator to the Company.

    Payment shall be made to the Company by wire transfer of immediately
available funds to a bank account designated by the Company against delivery to
the Lead Managers for the respective accounts of the International Managers of
certificates for the International Securities to be purchased by them. It is
understood that each International Manager has authorized the Lead Managers, for
its account, to accept delivery of, receipt for, and make payment of the
purchase price for, the International Initial Securities and the International
Option Securities, if any, which it has agreed to purchase.  Merrill Lynch,
individually and not as representative of the International Manager, may (but
shall not be obligated to) make payment of the purchase price for the
International Initial Securities or the International Option Securities, if any,
to be purchased by any International Manager whose funds have not been received
by the Closing Time or the relevant Date of Delivery, as the case may be, but
such payment shall not relieve such International Manager from its obligations
hereunder.

    (d)  DENOMINATIONS; REGISTRATION. Certificates for the International
    Initial Securities and the International Option Securities, if any, shall
    be in such denominations and registered in such names as the Lead Managers
    may request in writing at least one full business day before the Closing
    Time or the relevant Date of Delivery, as the case may be.  The
    certificates for the International Initial Securities and the International
    Option Securities, if any, will be made available for examination and
    packaging by the Lead Managers in The City of New York not later than 10:00
    A.M. (Eastern time) on the 

                                          12
<PAGE>

    business day prior to the Closing Time or the relevant Date of Delivery, 
    as the case may be. 

SECTION 3.    COVENANTS OF THE COMPANY. The Company covenants with each
International Manager as follows:

    (a)  COMPLIANCE WITH SECURITIES REGULATIONS AND COMMISSION REQUESTS.  The
    Company, subject to Section 3(b), will comply with the requirements of Rule
    430A or Rule 434, as applicable, and will notify the Lead Managers
    immediately, and confirm the notice in writing, (i) when any post-effective
    amendment to the Registration Statement shall become effective, or any
    supplement to the Prospectuses or any amended Prospectuses shall have been
    filed, (ii) of the receipt of any comments from the Commission, (iii) of
    any request by the Commission for any amendment to the Registration
    Statement or any amendment or supplement to the Prospectuses or for
    additional information, and (iv) of the issuance by the Commission of any
    stop order suspending the effectiveness of the Registration Statement or of
    any order preventing or suspending the use of any preliminary prospectus,
    or of the suspension of the qualification of the Securities for offering or
    sale in any jurisdiction, or of the initiation or threatening of any
    proceedings for any of such purposes. The Company will promptly effect the
    filings necessary pursuant to Rule 424(b) and will take such steps as it
    deems necessary to ascertain promptly whether the form of prospectus
    transmitted for filing under Rule 424(b) was received for filing by the
    Commission and, in the event that it was not, it will promptly file such
    prospectus. The Company will make every reasonable effort to prevent the
    issuance of any stop order and, if any stop order is issued, to obtain the
    lifting thereof at the earliest possible moment.

    (b)  FILING OF AMENDMENTS. The Company will give the Lead Managers notice
    of its intention to file or prepare any amendment to the Registration
    Statement (including any filing under Rule 462(b)), any Term Sheet or any
    amendment, supplement or revision to either the prospectuses included in
    the Registration Statement at the time it became effective or to the
    Prospectuses, whether pursuant to the 1933 Act, the 1934 Act or otherwise,
    will furnish the Lead Managers with copies of any such documents a
    reasonable amount of time prior to such proposed filing or use, as the case
    may be, and will not file or use any such document to which the Lead
    Managers or counsel for the International Managers shall object.

    (c)  DELIVERY OF REGISTRATION STATEMENTS. The Company has furnished or will
    deliver to the Lead Managers and counsel for the International Mangers,
    without charge, signed copies of the Registration Statement as originally
    filed and of each amendment thereto (including exhibits filed therewith or
    incorporated by reference therein and documents incorporated or deemed to
    be incorporated by reference therein) and signed copies of all consents and
    certificates of experts, and will also deliver to the Lead Managers,
    without 


                                          13
<PAGE>

    charge, a conformed copy of the Registration Statement as originally filed
    and of each amendment thereto (without exhibits) for each of the
    International Managers. The copies of the Registration Statement and each
    amendment thereto furnished to the International Managers will be identical
    to the electronically transmitted copies thereof filed with the Commission
    pursuant to EDGAR, except to the extent permitted by Regulation S-T.

    (d)  DELIVERY OF PROSPECTUSES. The Company has delivered to each
    International Manager, without charge, as many copies of each preliminary
    prospectus as such International Manager reasonably requested, and the
    Company hereby consents to the use of such copies for purposes permitted by
    the 1933 Act. The Company will furnish to each International Manager,
    without charge, during the period when the Prospectuses are required to be
    delivered under the 1933 Act or the 1934 Act, such number of copies of the
    Prospectuses (as amended or supplemented) as such International Manager may
    reasonably request. The Prospectuses and any amendments or supplements
    thereto furnished to the International Managers will be identical to the
    electronically transmitted copies thereof filed with the Commission
    pursuant to EDGAR, except to the extent permitted by Regulation S-T.

    (e)  CONTINUED COMPLIANCE WITH SECURITIES LAWS. The Company will comply
    with the 1933 Act and the 1933 Act Regulations and the 1934 Act and the
    1934 Act Regulations so as to permit the completion of the distribution of
    the Securities as contemplated in this Agreement and the U.S. Purchase
    Agreement and in the Prospectuses. If at any time when a prospectus is
    required by the 1933 Act to be delivered in connection with sales of the
    Securities, any event shall occur or condition shall exist as a result of
    which it is necessary, in the opinion of counsel for the International
    Managers or for the Company, to amend the Registration Statement or amend
    or supplement the Prospectuses in order that the Prospectuses will not
    include any untrue statements of a material fact or omit to state a
    material fact necessary in order to make the statements therein not
    misleading in the light of the circumstances existing at the time it is
    delivered to a purchaser, or if it shall be necessary, in the opinion of
    such counsel, at any such time to amend the Registration Statement or amend
    or supplement the Prospectuses in order to comply with the requirements of
    the 1933 Act or the 1933 Act Regulations, the Company will promptly prepare
    and file with the Commission, subject to Section 3(b), such amendment or
    supplement as may be necessary to correct such statement or omission or to
    make the Registration Statement or the Prospectuses comply with such
    requirements, and the Company will furnish to the International Managers
    such number of copies of such amendment or supplement as the International
    Managers may reasonably request.

    (f)  BLUE SKY QUALIFICATIONS. The Company will use its best efforts, in
    cooperation with the International Managers, to qualify the Securities for
    offering and sale under the applicable securities laws of such states and
    other jurisdictions (domestic or foreign) as the Lead Managers may
    designate and to maintain such qualifications in effect for a period of not
    less than one year from the later of the effective date of the Registration 


                                          14
<PAGE>

    Statement and any Rule 462(b) Registration Statement; provided, however,
    that the Company shall not be obligated to file any general consent to
    service of process or to qualify as a foreign corporation or as a dealer in
    securities in any jurisdiction in which it is not so qualified or to
    subject itself to taxation in respect of doing business in any jurisdiction
    in which it is not otherwise so subject. In each jurisdiction in which the
    Securities have been so qualified, the Company will file such statements
    and reports as may be required by the laws of such jurisdiction to continue
    such qualification in effect for a period of not less than one year from
    the effective date of the Registration Statement and any Rule 462(b)
    Registration Statement.

    (g)  RULE 158. The Company will timely file such reports pursuant to the
    1934 Act as are necessary in order to make generally available to its
    securityholders as soon as practicable an earnings statement for the
    purposes of, and to provide the benefits contemplated by, the last
    paragraph of Section 11(a) of the 1933 Act.

    (h)  USE OF PROCEEDS. The Company will use the net proceeds received by it
    from the sale of the Securities in the manner specified in the Prospectus
    under "Use of Proceeds."

    (i)  LISTING. The Company will use its best efforts to effect the listing
    of the Securities on the New York Stock Exchange, Chicago Stock Exchange
    and Pacific Exchange.

    (j)  RESTRICTION ON SALE OF SECURITIES. During a period of 120 days from
    the date of the Prospectuses, the Company will not, without the prior
    written consent of Merrill Lynch International (i) directly or indirectly,
    offer, pledge, sell, contract to sell, sell any option or contract to
    purchase, purchase any option or contract to sell, grant any option, right
    or warrant to purchase or otherwise transfer or dispose of any share of
    Common Stock or any securities convertible into or exercisable or
    exchangeable for Common Stock or file any registration statement under the
    1933 Act with respect to any of the foregoing or (ii) enter into any swap
    or any other agreement or any transaction that transfers, in whole or in
    part, directly or indirectly, the economic consequence of ownership of the
    Common Stock, whether any such swap or transaction described in clause (i)
    or (ii) above is to be settled by delivery of Common Stock or such other
    securities, in cash or otherwise.  The foregoing sentence shall not apply
    to (A) the Securities to be sold hereunder or under the U.S. Purchase
    Agreement, (B) any shares of Common Stock issued by the Company upon the
    exercise of an option or warrant or the conversion of a security
    outstanding on the date hereof and referred to in the Prospectuses, (C) any
    shares of Common Stock issued or options to purchase Common Stock granted
    pursuant to existing employee benefit plans of the Company referred to in
    the Prospectuses or (D) any shares of Common Stock issued pursuant to any
    non-employee director stock plan or dividend reinvestment plan.


                                          15
<PAGE>

    (k)  REPORTING REQUIREMENTS. The Company, during the period when the
    Prospectuses are required to be delivered under the 1933 Act or the 1934
    Act, will file all documents required to be filed with the Commission
    pursuant to the 1934 Act within the time periods required by the 1934 Act
    and the 1934 Act Regulations.

SECTION 4.    PAYMENT OF EXPENSES. (a) EXPENSES. The Company will pay or cause
to be paid all expenses incident to the performance of its obligations under
this Agreement, including (i) the preparation, printing and filing of the
Registration Statement (including financial statements and exhibits) as
originally filed and of each amendment thereto, (ii) the preparation, printing
and delivery to the Underwriters of this Agreement, any Agreement among
Underwriters, any Intersyndicate Agreement and such other documents as may be
required in connection with the offering, purchase, sale, issuance or delivery
of the Securities, (iii) the preparation, issuance and delivery of the
certificates for the Securities to the Underwriters, including any stock or
other transfer taxes and any stamp or other duties payable upon the sale,
issuance or delivery of the Securities to the Underwriters and the transfer of
the Securities between the International Managers and the International
Managers, (iv) the fees and disbursements of the Company's counsel, accountants
and other advisors, (v) the qualification of the Securities under securities
laws in accordance with the provisions of Section 3(f) hereof, including filing
fees and the reasonable fees and disbursements of counsel for the International
Managers in connection therewith and in connection with the preparation of the
Blue Sky Survey and any supplement thereto, (vi) the printing and delivery to
the Underwriters of copies of each preliminary prospectus, any Term Sheets and
of the Prospectuses and any amendments or supplements thereto, (vii) the
preparation, printing and delivery to the Underwriters of copies of the Blue Sky
Survey and any supplement thereto, (viii) the fees and expenses of any transfer
agent or registrar for the Securities and (ix) the fees and expenses incurred in
connection with the listing of the Securities on the New York Stock Exchange,
Chicago Stock Exchange and Pacific Exchange.

    (b)  TERMINATION OF AGREEMENT. If this Agreement is terminated by the Lead
    Managers in accordance with the provisions of Section 5, Section 9(a)(i) or
    Section 11 hereof, the Company shall reimburse the International Managers
    for all of their out-of-pocket expenses, including the reasonable fees and
    disbursements of counsel for the International Managers.

SECTION 5.    CONDITIONS OF INTERNATIONAL MANAGERS' OBLIGATIONS. The
obligations of the several International Managers hereunder are subject to the
accuracy of the representations and warranties of the Company contained in
Section 1 hereof or in certificates of any officer of the Company or any
subsidiary of the Company delivered pursuant to the provisions hereof, to the
performance by the Company of its covenants and other obligations hereunder, and
to the following further conditions:

    (a)  EFFECTIVENESS OF REGISTRATION STATEMENT. The Registration Statement,
    including any Rule 462(b) Registration Statement, has become effective and
    at Closing Time no stop order suspending the effectiveness of the
    Registration Statement shall have been issued under the 1933 Act or
    proceedings therefor initiated or threatened by the 


                                          16
<PAGE>

    Commission, and any request on the part of the Commission for additional
    information shall have been complied with to the reasonable satisfaction of
    counsel to the International Managers. A prospectus containing the Rule
    430A Information shall have been filed with the Commission in accordance
    with Rule 424(b) (or a post-effective amendment providing such information
    shall have been filed and declared effective in accordance with the
    requirements of Rule 430A) or, if the Company has elected to rely upon Rule
    434, a Term Sheet shall have been filed with the Commission in accordance
    with Rule 424(b).

    (b)  OPINION OF COUNSEL FOR COMPANY. At Closing Time, the Lead Managers
    shall have received the favorable opinion, dated as of Closing Time, of
    Gary R. Johnson, Vice President and General Counsel of the Company, in form
    and substance satisfactory to counsel for the International Managers,
    together with signed or reproduced copies of such letter for each of the
    other International Managers to the effect set forth in Exhibit A hereto
    and to such further effect as counsel to the International Managers may
    reasonably request.

    (c)  OPINION OF COUNSEL FOR INTERNATIONAL MANAGERS. At Closing Time, the
    Lead Managers shall have received the favorable opinion, dated as of
    Closing Time, of Gardner, Carton & Douglas, counsel for the International
    Managers, together with signed or reproduced copies of such letter for each
    of the other International Managers with respect to the matters set forth
    in clauses (i), (ii), (v), (vi) (solely as to preemptive or other similar
    rights arising by operation of law or under the charter or by-laws of the
    Company), (viii) through (x), inclusive, (xiii), (xv) (solely as to the
    information in the Prospectuses under "Description of Common Stock") and
    the penultimate paragraph of Exhibit A hereto. In giving such opinion such
    counsel may rely, as to all matters governed by the laws of the
    jurisdictions other than the federal law of the United States, upon the
    opinions of counsel satisfactory to the Lead Managers. Such counsel may
    also state that, insofar as such opinion involves factual matters, they
    have relied, to the extent they deem proper, upon certificates of officers
    of the Company and its subsidiaries and certificates of public officials.

    (d)  OFFICERS' CERTIFICATE. At Closing Time, there shall have not been,
    since the date hereof or since the respective dates as of which information
    is given in the Prospectuses, any material adverse change in the condition,
    financial or otherwise, or in the earnings, business affairs or business
    prospects of the Company and its subsidiaries considered as one enterprise,
    whether or not arising in the ordinary course of business, and the Lead
    Managers shall have received a certificate of the President or a Vice
    President of the Company and of the chief financial or chief accounting
    officer of the Company, dated as of Closing Time, to the effect that (i)
    there has been no such material adverse change, (ii) the representations
    and warranties in Section 1(a) hereof are true and correct with the same
    force and effect as though expressly made at and as of Closing Time, (iii)
    the Company has complied with all agreements and satisfied all conditions
    on its part to be 


                                          17
<PAGE>

    performed or satisfied at or prior to Closing Time, and (iv) no stop order
    suspending the effectiveness of the Registration Statement has been issued
    and no proceedings for that purpose have been instituted or are pending or
    are contemplated by the Commission.

    (e)  ACCOUNTANT'S COMFORT LETTER. At the time of the execution of this
    Agreement, the Lead Managers shall have received from Price Waterhouse LLP
    a letter dated such date, in form and substance satisfactory to the Lead
    Managers, together with signed or reproduced copies of such letter for each
    of the other International Managers containing statements and information
    of the type ordinarily included in accountants' "comfort letters" to
    underwriters with respect to the financial statements and certain financial
    information contained in the Registration Statement and the Prospectuses.

    (f)  BRING-DOWN COMFORT LETTER. At Closing Time, the Lead Managers shall
    have received from Price Waterhouse LLP a letter, dated as of Closing Time,
    to the effect that they reaffirm the statements made in the letter
    furnished pursuant to subsection (e) of this Section, except that the
    specified date referred to shall be a date not more than three business
    days prior to Closing Time. 

    (g)  APPROVAL OF LISTING. At Closing Time, the Securities shall have been
    approved for listing on the New York Stock Exchange, subject only to
    official notice of issuance.

    (h)  PURCHASE OF U.S. INITIAL SECURITIES. Contemporaneously with the
    purchase by the International Managers of the International Initial
    Securities under this Agreement, the U.S. Underwriters shall have purchased
    the U.S. Initial Securities under the U.S. Purchase Agreement.

    (i)  CONDITIONS TO PURCHASE OF INTERNATIONAL OPTION SECURITIES. In the
    event that the International Underwriters exercise their option provided in
    Section 2(b) hereof to purchase all or any portion of the International
    Option Securities, the representations and warranties of the Company
    contained herein and the statements in any certificates furnished by the
    Company and any subsidiary of the Company hereunder shall be true and
    correct as of each Date of Delivery and, at the relevant Date of Delivery,
    the Lead Managers shall have received: 

         (i)  OFFICERS' CERTIFICATE.  A certificate, dated such Date of
         Delivery, of the President or a Vice President of the Company and of
         the chief financial or chief accounting officer of the Company
         confirming that the certificate delivered at the Closing Time pursuant
         to Section 5(d) hereof remains true and correct as of such Date of
         Delivery.  


                                          18
<PAGE>

         (ii) OPINION OF COUNSEL FOR COMPANY. . The favorable opinion of Gary
         R. Johnson, Vice President and General Counsel of the Company in form
         and substance satisfactory to counsel for the International Managers,
         dated such Date of Delivery, relating to the International Option
         Securities to be purchased on such Date of Delivery and otherwise to
         the same effect as the opinion required by Section 5(b) hereof.

         (iii) OPINION OF COUNSEL FOR INTERNATIONAL MANAGERS. . The favorable
         opinion of Gardner, Carton & Douglas, counsel for the International
         Managers, dated such Date of Delivery, relating to the International
         Option Securities to be purchased on such Date of Delivery and
         otherwise to the same effect as the opinion required by Section 5(c)
         hereof. 

         (iv) BRING-DOWN COMFORT LETTER. . A letter from Price Waterhouse LLP,
         in form and substance satisfactory to the Lead Managers and dated such
         Date of Delivery, substantially in the same form and substance as the
         letter furnished to the Lead Managers pursuant to Section 5(e) hereof,
         except that the "specified date" in the letter furnished pursuant to
         this paragraph shall be a date not more than five days prior to such
         Date of Delivery.

    (j)  ADDITIONAL DOCUMENTS. At Closing Time and at each Date of Delivery
    counsel for the International Managers shall have been furnished with such
    documents and opinions as they may require for the purpose of enabling them
    to pass upon the issuance and sale of the Securities as herein
    contemplated, or in order to evidence the accuracy of any of the
    representations or warranties, or the fulfillment of any of the conditions,
    herein contained; and all proceedings taken by the Company in connection
    with the issuance and sale of the Securities as herein contemplated shall
    be satisfactory in form and substance to the Lead Managers and counsel for
    the International Managers.

    (k)  TERMINATION OF AGREEMENT. If any condition specified in this Section
    shall not have been fulfilled when and as required to be fulfilled, this
    Agreement, or, in the case of any condition to the purchase of
    International Option Securities on a Date of Delivery which is after the
    Closing Time, the obligations of the several International Managers to
    purchase the relevant International Option Securities, may be terminated by
    the Lead Managers by notice to the Company at any time at or prior to
    Closing Time or such Date of Delivery, as the case may be, and such
    termination shall be without liability of any party to any other party
    except as provided in Section 4 and except that Sections 1, 6, 7 and 8
    shall survive any such termination and remain in full force and effect.


                                          19
<PAGE>

SECTION 6.    INDEMNIFICATION.

    (a)  INDEMNIFICATION OF INTERNATIONAL MANAGERS. The Company agrees to
    indemnify and hold harmless each International Manager and each person, if
    any, who controls any International Manager within the meaning of Section
    15 of the 1933 Act or Section 20 of the 1934 Act as follows:

         (i)  against any and all loss, liability, claim, damage and expense
         whatsoever, as incurred, arising out of any untrue statement or
         alleged untrue statement of a material fact contained in the
         Registration Statement (or any amendment thereto), including the Rule
         430A Information and Rule 434 Information, if applicable, or the
         omission or alleged omission therefrom of a material fact required to
         be stated therein or necessary to make the statements therein not
         misleading or arising out of any untrue statement or alleged untrue
         statement of a material fact included in any preliminary prospectus or
         the Prospectuses (or any amendment or supplement thereto), or the
         omission or alleged omission therefrom of a material fact necessary in
         order to make the statements therein, in the light of the
         circumstances under which they were made, not misleading;

         (ii) against any and all loss, liability, claim, damage and expense
         whatsoever, as incurred, to the extent of the aggregate amount paid in
         settlement of any litigation, or any investigation or proceeding by
         any governmental agency or body, commenced or threatened, or of any
         claim whatsoever based upon any such untrue statement or omission, or
         any such alleged untrue statement or omission; provided that (subject
         to Section 6(d) below) any such settlement is effected with the
         written consent of the Company; and

         (iii) against any and all expense whatsoever, as incurred (including
         the fees and disbursements of counsel chosen by Merrill Lynch
         International), reasonably incurred in investigating, preparing or
         defending against any litigation, or any investigation or proceeding
         by any governmental agency or body, commenced or threatened, or any
         claim whatsoever based upon any such untrue statement or omission, or
         any such alleged untrue statement or omission, to the extent that any
         such expense is not paid under (i) or (ii) above;

PROVIDED, HOWEVER, that this indemnity agreement shall not apply to any loss,
liability, claim, damage or expense to the extent arising out of any untrue
statement or omission or alleged untrue statement or omission made in reliance
upon and in conformity with written information furnished to the Company by any
International Manager through Merrill Lynch International expressly for use in
the Registration Statement (or any amendment thereto), including the Rule 430A
Information and the Rule 434 Information, if applicable, or any preliminary
prospectus or the International Prospectus (or any amendment or supplement
thereto).


                                          20
<PAGE>

    (b)  INDEMNIFICATION OF COMPANY, DIRECTORS AND OFFICERS. Each International
    Manager severally agrees to indemnify and hold harmless the Company, its
    directors, each of its officers who signed the Registration Statement, and
    each person, if any, who controls the Company within the meaning of Section
    15 of the 1933 Act or Section 20 of the 1934 Act, against any and all loss,
    liability, claim, damage and expense described in the indemnity contained
    in subsection (a) of this Section, as incurred, but only with respect to
    untrue statements or omissions, or alleged untrue statements or omissions,
    made in the Registration Statement (or any amendment thereto), including
    the Rule 430A Information and the Rule 434 Information, if applicable, or
    any preliminary prospectus or the International Prospectus (or any
    amendment or supplement thereto) in reliance upon and in conformity with
    written information furnished to the Company by such International Manager
    through Merrill Lynch International expressly for use in the Registration
    Statement (or any amendment thereto) or such preliminary prospectus or the
    International Prospectus (or any amendment or supplement thereto).

    (c)  ACTIONS AGAINST PARTIES; NOTIFICATION. Each indemnified party shall
    give notice as promptly as reasonably practicable to each indemnifying
    party of any action commenced against it in respect of which indemnity may
    be sought hereunder, but failure to so notify an indemnifying party shall
    not relieve such indemnifying party from any liability hereunder to the
    extent it is not materially prejudiced as a result thereof and in any event
    shall not relieve it from any liability which it may have otherwise than on
    account of this indemnity agreement.  In the case of parties indemnified
    pursuant to Section 6(a) above, counsel to the indemnified parties shall be
    selected by Merrill Lynch International, and, in the case of parties
    indemnified pursuant to Section 6(b) above, counsel to the indemnified
    parties shall be selected by the Company. An indemnifying party may
    participate at its own expense in the defense of any such action; provided,
    however, that counsel to the indemnifying party shall not (except with the
    consent of the indemnified party) also be counsel to the indemnifying
    party. In no event shall the indemnifying parties be liable for fees and
    expenses of more than one counsel (in addition to any local counsel)
    separate from their own counsel for all indemnified parties in connection
    with any one action or separate but similar or related actions in the same
    jurisdiction arising out of the same general allegations or circumstances.
    No indemnifying party shall, without the prior written consent of the
    indemnified parties, settle or compromise or consent to the entry of any
    judgment with respect to any litigation, or any investigation or proceeding
    by any governmental agency or body, commenced or threatened, or any claim
    whatsoever in respect of which indemnification or contribution could be
    sought under this Section 6 or Section 7 hereof (whether or not the
    indemnified parties are actual or potential parties thereto), unless such
    settlement, compromise or consent (i) includes an unconditional release of
    each indemnified party from all liability arising out of such litigation,
    investigation, proceeding or claim and (ii) does not include a statement as
    to or an admission of fault, culpability or a failure to act by or on
    behalf of any indemnified party.


                                          21
<PAGE>

    (d)  SETTLEMENT WITHOUT CONSENT IF FAILURE TO REIMBURSE. If at any time an
    indemnified party shall have requested an indemnifying party to reimburse
    the indemnified party for fees and expenses of counsel, such indemnifying
    party agrees that it shall be liable for any settlement of the nature
    contemplated by Section 6(a)(ii) effected without its written consent if
    (i) such settlement is entered into more than 45 days after receipt by such
    indemnifying party of the aforesaid request, (ii) such indemnifying party
    shall have received notice of the terms of such settlement at least 30 days
    prior to such settlement being entered into and (iii) such indemnifying
    party shall not have reimbursed such indemnified party in accordance with
    such request prior to the date of such settlement.

SECTION 7.    CONTRIBUTION. If the indemnification provided for in Section 6
hereof is for any reason unavailable to or insufficient to hold harmless an
indemnified party in respect of any losses, liabilities, claims, damages or
expenses referred to therein, then each indemnifying party shall contribute to
the aggregate amount of such losses, liabilities, claims, damages or expenses
incurred by such indemnified party, as incurred, (i) in such proportion as is
appropriate to reflect the relative benefits received by the Company on the one
hand and the International Managers on the other hand from the offering of the
International Securities pursuant to this Agreement or (ii) if the allocation
provided by clause (i) is not permitted by applicable law, in such proportion as
is appropriate to reflect not only the relative benefits referred to in clause
(i) above but also the relative fault of the Company on the one hand and the
International Managers on the other hand in connection with the statements of
omissions which resulted in such losses, liabilities, claims, damages or
expenses, as well as any other relevant equitable considerations.

    The relative benefits received by the Company on the one hand and the
International Managers on the other hand in connection with the offering of the
International Securities pursuant to this Agreement shall be deemed to be in the
same respective proportions as the total net proceeds from the offering of the
International Securities pursuant to this Agreement (before deducting expenses)
received by the Company and the total underwriting discount received by the
International Managers, in each case as set forth on the cover of the
International Prospectus, or, if Rule 434 is used, the corresponding location on
the Term Sheet bear to the aggregate initial public offering price of the
International Securities as set forth on such cover.

    The relative fault of the Company on the one hand and the International
Managers on the other hand shall be determined by reference to, among other
things, whether any such untrue or alleged untrue statement of a material fact
or omission or alleged omission to state a material fact relates to information
supplied by the Company or by the International Managers and the parties'
relative intent, knowledge, access to information and opportunity to correct or
prevent such statement or omission.

    The Company and the International Managers agree that it would not be just
and equitable if the contribution pursuant to this Section 7 were determined by
pro rata allocation (even if the International Managers were treated as one
entity for such purpose) or by any other method of allocation which does not
take account of the equitable considerations referred to above in this Section
7. The aggregate amount of losses, liabilities, claims, damages or 


                                          22
<PAGE>

expenses incurred by an indemnified party and referred to above in this Section
7 shall be deemed to include any legal or other expenses reasonably incurred by
such indemnified party in investigating, preparing or defending against any
litigation, or any investigation or proceeding by any governmental agency or
body, commenced or threatened, or any claim whatsoever based upon any such
untrue or alleged untrue statement or omission or alleged omission.

    Notwithstanding the provisions of this Section 7, no International Manager
shall be required to contribute any amount in excess of the amount by which the
total price at which the International Securities underwritten by it and
distributed to the public were offered to the public exceeds the amount of any
damages which such International Manager has otherwise been required to pay by
reason of any such untrue or alleged untrue statement or omission or alleged
omission.

    No person guilty of fraudulent misrepresentation (within the meaning of
Section 11(f) of the 1933 Act) shall be entitled to contribution from any person
who was not guilty of such fraudulent misrepresentation.

    For purposes of this Section 7, each person, if any, who controls an a
International Manager within the meaning of Section 15 of the 1933 Act or
Section 20 of the 1934 Act shall have the same rights to contribution as such
International Manager, and each director of the Company, each officer of the
Company who signed the Registration Statement, and each person, if any, who
controls the Company within the meaning of Section 15 of the 1933 Act or Section
20 of the 1934 Act shall have the same rights to contribution as the Company.
The International Manager's respective obligations to contribute pursuant to
this Section 7 are several in proportion to the number of International Initial
Securities set forth opposite their respective names in Schedule A hereto and
not joint.

SECTION 8.    REPRESENTATIONS, WARRANTIES AND AGREEMENTS TO SURVIVE DELIVERY. 
All representations, warranties and agreements contained in this Agreement or in
certificates of officers of the Company or any of its subsidiaries submitted
pursuant hereto, shall remain operative and in full force and effect, regardless
of any investigation made by or on behalf of any International Manager or
controlling person, or by or on behalf of the Company, and shall survive
delivery of the Securities to the International Managers.

SECTION 9.    TERMINATION OF AGREEMENT

    (a)  TERMINATION; GENERAL. The Lead Managers may terminate this Agreement,
    by notice to the Company, at any time at or prior to Closing Time (i) if
    there has been, since the time of execution of this Agreement or since the
    respective dates as of which information is given in the Prospectuses, any
    material adverse change, or any development which could reasonably be
    expected to result in a prospective material adverse change, in the
    condition, financial or otherwise, or in the earnings, business affairs or
    business prospects of the Company and its subsidiaries considered as one
    enterprise, whether or not arising in the ordinary course of business, or
    (ii) if there has occurred any material adverse change in the financial
    markets in the United States, any 


                                          23
<PAGE>

    outbreak of hostilities or escalation thereof or other calamity or crisis
    or any change or development involving a prospective change in national or
    international political, financial or economic conditions, in each case the
    effect of which is such as to make it, in the judgment of the Lead
    Managers, impracticable to market the Securities or to enforce contracts
    for the sale of the Securities, or (iii) if trading in any securities of
    the Company has been suspended or materially limited by the Commission or
    the New York Stock Exchange, or if trading generally on the American Stock
    Exchange or the New York Stock Exchange or in the Nasdaq National Market
    has been suspended or materially limited, or minimum or maximum prices for
    trading have been fixed, or maximum ranges for prices have been required,
    by any of said exchanges or by such system or by order of Commission, the
    National Association of Securities Dealers, Inc. or any other governmental
    authority, of (iv) if a banking moratorium has been declared by either
    Federal, Minnesota or New York authorities.

    (b)  LIABILITIES. If this Agreement is terminated pursuant to this Section,
    such termination shall be without liability of any party to any other party
    except as provided in Section 4 hereof, and provided further that Sections
    1, 6, 7 and 8 shall survive such termination and remain in full force and
    effect.

SECTION 10.   DEFAULT BY ONE OR MORE OF THE INTERNATIONAL MANAGERS. If one or
more of the International Managers shall fail at Closing Time or a Date of
Delivery to purchase the Securities which it or they are obligated to purchase
under this Agreement (the "Defaulted Securities"), the Lead Managers shall have
the right, within 24 hours thereafter, to make arrangement for one or more of
the non-defaulting International Managers, or any other underwriters, to
purchase all, but not less than all, of the Defaulted Securities in such amounts
as may be agreed upon and upon the terms herein set forth; if, however, the Lead
Managers shall not have completed such arrangements within such 24-hour period;
then:

    (a)  if the number of Defaulted Securities does not exceed 10% of the
    number of International Securities to be purchased on such date, each of
    the non-defaulting International Managers shall be obligated, severally and
    not jointly, to purchase the full amount thereof in the proportions that
    their respective underwriting obligations hereunder bear to the
    underwriting obligations of all non-defaulting International Managers, or

    (b)  if the number of Defaulted Securities exceeds 10% of the number of
    International Securities to be purchased on such date, this Agreement or,
    with respect to any Date of Delivery which occurs after the Closing Time,
    the obligation of the International Managers to purchase and of the Company
    to sell the International Option Securities to be purchased and sold on
    such Date of Delivery shall terminate without liability on the party of any
    non-defaulting International Manager. 

    No action taken pursuant to this Section shall relieve any defaulting
International Manager from liability in respect of its default.


                                          24
<PAGE>

    In the event of any such default which does not result in a termination of
this Agreement or, in the case of a Date of Delivery which is after the Closing
Time, which does not result in a termination of the obligation of the
International Managers to purchase and the Company to sell the relevant
International Option Securities, as the case may be, either the Lead Managers or
the Company shall have the right to postpone Closing Time or the relevant Date
of Delivery, as the case may be, for a period not exceeding seven days in order
to effect any required changes in the Registration Statement or Prospectuses or
in any other documents or arrangements. As used herein, the term "International
Manager" includes any person substituted for an International Manager under this
Section 10.

SECTION 11.   NOTICES. All notices and other communications hereunder shall be
in writing and shall be deemed to have been duly given if mailed or transmitted
by any standard form of telecommunication. Notices to the International Managers
shall be directed to the Lead Managers at: Merrill Lynch International,
Ropemaker Place, 25 Ropemaker Street, London EC2Y 9LY, England, attention of
Equity Capital Markets; with a copy to Gardner, Carton & Douglas, 321 N. Clark
Street, Chicago, Illinois 60610, attention of Robert J. Joseph, Esq.; and
notices to the Company shall be directed to it at Northern States Power Company,
414 Nicollet Mall, Minneapolis, Minnesota 55401, attention of Corporate
Secretary.

SECTION 12.   PARTIES. This Agreement shall inure to the benefit of and be
binding upon the International Managers and the Company and their respective
successors. Nothing expressed or mentioned in this Agreement is intended or
shall be construed to give any person, firm or corporation, other than the
International Managers and the Company and their respective successors and the
controlling persons and officers and directors referred to in Sections 6 and 7
and their heirs and legal representatives, any legal or equitable right, remedy
or claim under or in respect of this Agreement or any provision herein
contained. This Agreement and all conditions and provisions hereof are intended
to be for the sole and exclusive benefit of the International Managers and the
Company and their respective successors, and said controlling persons and
officers and directors and their heirs and legal representatives, and for the
benefit of no other person, firm or corporation. No purchaser of Securities from
any International Manager shall be deemed to be a successor by reason merely of
such purchase.

SECTION 13.   GOVERNING LAW AND TIME. THIS AGREEMENT SHALL BE GOVERNED BY AND
CONSTRUED IN ACCORDANCE WITH THE LAWS OF THE STATE OF MINNESOTA APPLICABLE TO
AGREEMENTS MADE AND TO BE PERFORMED IN SAID STATE. EXCEPT AS OTHERWISE SET FORTH
HEREIN, SPECIFIED TIMES OF DAY REFER TO MINNEAPOLIS TIME.


                                          25
<PAGE>

SECTION 14.   EFFECT OF HEADINGS. The Article and Section headings herein and
the Table of Contents are for convenience only and shall not affect the
construction hereof.

    If the foregoing is in accordance with your understanding of our agreement,
please sign and return to the Company a counterpart hereof, whereupon this
instrument, along with all counterparts, will become a binding agreement among
the International Managers and the Company in accordance with its terms.

                                       Very truly yours,

                                       NORTHERN STATES POWER COMPANY 
                                       (a Minnesota corporation)

                                       By: 
                                          ----------------------------------- 
                                       Title: 

CONFIRMED AND ACCEPTED, 
as of the date first above written:

MERRILL LYNCH INTERNATIONAL 
GOLDMAN, SACHS INTERNATIONAL 
SALOMON BROTHERS
INTERNATIONAL LIMITED 
DAIN BOSWORTH INCORPORATED 
PIPER JAFFRAY INC.

By: MERRILL LYNCH INTERNATIONAL

By:       
   -------------------------------------
    Authorized Signatory

For themselves and as Lead Managers of the other International Managers named in
Schedule A hereto.


                                          26
<PAGE>

 SCHEDULE A

                                                             Number of 
                                                            International 
    Name of International Managers                         Initial Securities
    ------------------------------                         ------------------

Merrill Lynch International 
Goldman, Sachs International. . . . . . . . . . . . . . .
Salomon Brothers International Limited. . . . . . . . . .
Dain Bosworth Incorporated. . . . . . . . . . . . . . . .
Piper Jaffray Inc.. . . . . . . . . . . . . . . . . . . .


                                                                -------

Total . . . . . . . . . . . . . . . . . . . . . . . . . .       800,000
                                                                -------
                                                                -------
                                          27
<PAGE>

                                      SCHEDULE B

                            NORTHERN STATES POWER COMPANY
                               (a Minnesota corporation)
                            800,000 Shares of Common Stock 
                             (Par Value $2.50 Per Share)



    1.   The initial public offering price per share for the Securities,
determined as provided in said Section 2, shall be $__________.

    2.   The purchase price per share for the International Securities to be
paid by the several International Managers shall be $__________, being an amount
equal to the initial public offering price set forth above less $__________ per
share; provided that the purchase price per share for any International Option
Securities purchased upon the exercise of the over- allotment option described
in Section 2(b) shall be reduced by an amount per share equal to any dividends
or distributions declared by the Company and payable on the International
Initial Securities but not payable on the International Option Securities.


                                          28
<PAGE>

                                                                       EXHIBIT A

                          FORM OF OPINION OF GARY R. JOHNSON

Re:      800,000 Shares of Common Stock, par value $2.50 
         per share, of Northern States Power Company, 
         a Minnesota corporation

Gentlemen:

    For the purpose of rendering this opinion, I have examined the proceedings
taken by Northern States Power Company, a Minnesota corporation, herein called
the "Company," with respect to the issue and sale by the Company of 800,000
shares of Common Stock, par value $2.50 per share, herein called the
"Securities." In connection therewith I have participated in the preparation of
the proceedings for the issuance and sale of the Securities including (i) the
International Purchase Agreement dated ________________, between you and the
Company relating to your purchase of the International Securities, herein called
the "Agreement" and (ii) the U.S. Purchase Agreement dated ______ between
_______ and the Company relating to the issue and sale of the U.S. Securities,
herein called the "U.S. Purchase Agreement."  I also have participated in the
preparation of or examined the registration statement and any amendments thereto
and the accompanying prospectuses and any supplements thereto, as filed under
the Securities Act of 1933, as amended (the "Act"), with respect to the
Securities. Capitalized terms not otherwise defined herein shall have the
respective meanings set forth in the Agreement.  My examination has extended to
all statutes, records, instruments, and documents which I have deemed necessary
to examine for the purposes of this opinion.

I am of the opinion that:

    1.   The Company has been duly incorporated and is validly existing as a
corporation in good standing under the laws of the State of Minnesota.

    2.   The Company has corporate power and authority to own, lease and
operate its properties and to conduct its business as described in the
Prospectuses and to enter into and perform its obligations under the Agreement
and the U.S. Purchase Agreement.

    3.   The Company is duly qualified as a foreign corporation to transact
business and is in good standing in each jurisdiction in which such
qualification is required, whether by reason of the ownership or leasing of
property or the conduct of business, except where the failure so to qualify or
to be in good standing would not result in a Material Adverse Effect.

    4.   The authorized, issued and outstanding capital stock of the Company is
as set forth in the Prospectuses in the column entitled "Actual" under the
caption "Capitalization" (except for subsequent issuances, if any, pursuant to
the Agreement and the U.S. Purchase Agreement or pursuant to reservations,
agreements or employee benefit plans referred to in the Prospectuses or pursuant
to the exercise of convertible securities or options referred to in the 


                                         A-1
<PAGE>

Prospectuses); the shares of issued and outstanding capital stock of the Company
have been duly authorized and validly issued and are fully paid and
non-assessable; and none of the outstanding shares of capital stock of the
Company was issued in violation of the preemptive or other similar rights of any
securityholder of the Company.

    5.   The Securities to be purchased by the International Managers and the
U.S. Underwriters from the Company have been duly authorized for issuance and
sale to the International Managers and the U.S. Underwriters pursuant to the
Agreement and the U.S. Purchase Agreement, respectively, and, when issued and
delivered by the Company pursuant to the Agreement and the U.S. Purchase
Agreement, respectively, against payment of the consideration set forth in the
Agreement and the U.S. Purchase Agreement, respectively, will be validly issued
and fully paid and non-assessable and no holder of the Securities is or will be
subject to personal liability by reason of being such a holder.

    6.   The issuance and sale of the Securities by the Company is not subject
to the preemptive or other similar rights of any securityholder of the Company.

    7.   Each Significant Subsidiary has been duly incorporated and is validly
existing as a corporation in good standing under the laws of the jurisdiction of
its incorporation, has corporate power and authority to own, lease and operate
its properties and to conduct its business as described in the Prospectuses and
is duly qualified as a foreign corporation to transact business and is in good
standing in each jurisdiction in which such qualification is required, whether
by reason of the ownership or leasing of property or the conduct of business,
except where the failure so to qualify or to be in good standing would not
result in a Material Adverse Effect; except as otherwise disclosed in the
Registration Statement, all of the issued and outstanding capital stock of each
Significant Subsidiary has been duly authorized and validly issued, is fully
paid and non-assessable and, to the best of my knowledge, is owned by the
Company, directly or through subsidiaries, free and clear of any security
interest, mortgage, pledge, lien, encumbrance, claim or equity; none of the
outstanding shares of capital stock of any Significant Subsidiary was issued in
violation of the preemptive or similar rights of any securityholder of such
Subsidiary.

    8.   The Agreement and the U.S. Purchase Agreement have been duly
authorized, executed and delivered by the Company.

    9.   The Registration Statement, including any Rule 462(b) Registration
Statement has been declared effective under the 1933 Act; any required filing of
the Prospectuses pursuant to Rule 424(b) has been made in the manner and within
the time period required by Rule 424(b); and, to the best of my knowledge, no
stop order suspending the effectiveness of the Registration Statement or any
Rule 462(b) Registration Statement has been issued under the 1933 Act and no
proceedings for that purpose have been instituted or are pending or threatened
by the Commission.

    10.  The Registration Statement, including any Rule 462(b) Registration
Statement, the Rule 430A Information and the Rule 434 Information, as
applicable, the Prospectuses, 


                                         A-2
<PAGE>

excluding the documents incorporated by reference therein, and each amendment or
supplement to the Registration Statement and Prospectuses, excluding the
documents incorporated by reference therein, as of their respective effective or
issue dates (other than the financial statements and supporting schedules
included therein or omitted therefrom, as to which I need express no opinion)
complied as to form in all material respects with the requirements of the 1933
Act and the 1933 Act Regulations.

    11.  The documents incorporated by reference in the Prospectus (other than
the financial statements and supporting schedules included therein or omitted
therefrom, as to which I need express no opinion), when they were filed with the
Commission complied as to form in all material respects with the requirements of
the 1934 Act and the rules and regulations of the Commission thereunder.

    12.  If Rule 434 has been relied upon, the Prospectus was not "materially
different," as such term is used in Rule 434, from the prospectus included in
the Registration Statement at the time it became effective.

    13.  The form of certificate used to evidence the Common Stock complies in
all material respects with all applicable statutory requirements, with any
applicable requirements of the charter and by-laws of the Company and the
requirements of the New York Stock Exchange.

    14.  To the best of my knowledge, there is not pending or threatened any
action, suit, proceeding, inquiry or investigation, to which the Company or any
subsidiary is a party, or to which the property of the Company or any subsidiary
is subject, before or brought by any court or governmental agency or body,
domestic or foreign, which might reasonably be expected to result in a Material
Adverse Effect, or which might reasonably by expected to materially and
adversely affect the properties or assets thereof or the consummation of the
transactions contemplated in the Agreement and the U.S. Purchase Agreement or
the performance by the Company of its obligations thereunder.

    15.  The information in the Prospectus under "Description of Common Stock"
and "Certain United States Tax Consequences to Non United States Holders"), and
in the Registration Statement under Item 15, to the extent that it constitutes
matters of law, summaries of legal matters, the Company's charter and bylaws or
legal proceedings, or legal conclusions, has been reviewed by me and is correct
in all material respects.

    16.  To the best of my knowledge, there are no statutes or regulations that
are required to be described in the Prospectus that are not described as
required.

    17.  All Descriptions in the Registration Statement of contracts and other
documents to which the Company or its subsidiaries are a party are accurate in
all material respects; to the best of my knowledge, there are no franchises,
contracts, indentures, mortgage, loan agreements, notes, leases or other
instruments required to be described or referred to in the Registration
Statement or to be filed as exhibits thereto other than those described or
referred to therein or 


                                         A-3
<PAGE>

filed or incorporated by reference as exhibits thereto, and the descriptions
thereof or references thereto are correct in all material respects.

    18.  To the best of my knowledge, neither the Company nor any subsidiary is
in violation of its charter or by-laws and no default by the Company or any
subsidiary exists in the due performance or observance of any material
obligation, agreement, covenant or condition contained in any contract,
indenture, mortgage, loan agreement, note, lease or other agreement or
instrument that is described or referred to in the Registration Statement or the
Prospectuses or filed or incorporated by reference as an exhibit to the
Registration Statement.

    19.  The Minnesota Public Utilities Commission has issued its order
approving the Company's capital structure which order authorizes the issuance of
the Securities, and no other filing with, or authorization, approval, consent,
license, order, registration, qualification or decree of, any court or
governmental authority or agency, domestic or foreign (other than under the 1933
Act and the 1933 Act Regulations, which have been obtained, or as may be
required under the securities or blue sky laws of the various states, as to
which I need express no opinion) is necessary or required in connection with the
due authorization, execution and delivery of the Agreement and the U.S. Purchase
Agreement or for the offering, issuance, sale or delivery of the Securities.

    20.  The execution, delivery and performance of the Agreement and the U.S.
Purchase Agreement and the consummation of the transactions contemplated in the
Agreement and the U.S. Purchase Agreement and in the Registration Statement
(including the issuance and sale of the Securities and the use of the proceeds
from the sale of the Securities as described in the Prospectuses under the
caption "Use of Proceeds") and compliance by the Company with its obligations
under the Agreement and the U.S. Purchase Agreement do not and will not, whether
with or without the giving of notice or lapse of time or both, conflict with or
constitute a breach of, or default or Repayment Event (as defined in Section
1(a)(xi) of the Purchase Agreement) under or result in the creation or
imposition of any lien, charge or encumbrance upon any property or assets of the
Company or any subsidiary pursuant to any contract, indenture, mortgage, deed of
trust, loan or credit agreement, note, lease or any other agreement or
instrument, known to me, to which the Company or any subsidiary is a party or by
which it or any of them may be bound, or to which any of the property or assets
of the Company or any subsidiary is subject (except for such conflicts, breaches
or defaults or liens, charges or encumbrances that would not have a Material
Adverse Effect), nor will such action result in any violation of the provisions
of the charter or by-laws of the Company or any subsidiary, or any applicable
law, statute, rule, regulation, judgment, order, writ or decree, known to me, of
any government, government instrumentality or court, domestic or foreign, having
jurisdiction over the Company or any subsidiary or any of their respective
properties, assets or operations.

    21.  The Company is not an "investment company" or an entity "controlled"
by an "investment company," as such terms are defined in the 1940 Act.

    22.  The Company has good and valid title to all real and fixed property
and leasehold rights owned by it, subject only to: (a) taxes and assessments not
yet delinquent; (b) the lien of 


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the Indenture (as defined in the Agreement); (c) as to parts of the Company's
property, certain easements, conditions, restrictions, leases, and similar
encumbrances which do not affect the Company's use of such property in the usual
course of its business, certain minor defects in titles which are not material,
defects in titles to certain properties which are not essential to the Company's
business; and mechanics' lien claims being contested or not of record or for the
satisfaction or discharge of which adequate provision has been made by the
Company pursuant to the Indenture. 

23. The Company has all necessary power under statutory provisions, franchises
(which expire at various dates), or permits to serve the customers in the
jurisdictions where it provides electric and gas service, except in certain
instances that are not material to the Company. 

These opinions do not cover title to easements for water flowage purposes or
rights of way for electric and gas transmission and distribution facilities,
steam mains, and telephone lines. However, the Company has the power of eminent
domain in the states in which it operates.

In the course of my participation in the preparation of the Registration
Statement and Prospectuses I made investigations as to the accuracy of certain
of the statements of fact contained therein, I discussed other matters with
officers, employees, and Lead Managers of the Company, and I examined various
corporate records and data. While I do not pass upon or assume responsibility
for, and shall not be deemed to have independently verified, the accuracy and
completeness of the statements contained in the Registration Statement or
Prospectuses (except as to matters set forth in paragraphs 4,15 and 17 above)
nothing has come to my attention that would lead me to believe that the
Registration Statement (including the Rule 430A Information) at the time it
became effective contained an untrue statement of a material fact or omitted to
state a material fact required to be stated therein or necessary to make the
statements therein not misleading or that the Prospectuses as of the date of the
Agreement or at the date hereof contained an untrue statement of a material fact
or omitted to state a material fact necessary in order to make the statements
therein, in the light of the circumstances under which they were made. not
misleading.

In giving my opinion under paragraph 22 above. I have relied upon examinations
of abstracts of titles to properties of the Company, said abstracts bearing
various dates, and nothing has come to my attention which would lead me to
believe that anything has occurred since the dates of the abstracts which would
adversely affect the titles shown on the abstracts. In giving opinions as to
conformity to the laws of States other than Minnesota and as to the franchise
and titles to property of the Company, I have in certain instances relied upon
the opinion of other counsel employed or retained by the Company to render
opinions in respect thereto.


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                                  Respectfully submitted,

                                  By:_________________________________ 
                                     Gary R. Johnson 
                                     VICE PRESIDENT AND GENERAL 
                                     COUNSEL NORTHERN STATES POWER COMPANY


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