<SEC-DOCUMENT>0000895728-19-000069.txt : 20190326
<SEC-HEADER>0000895728-19-000069.hdr.sgml : 20190326
<ACCEPTANCE-DATETIME>20190326120832
ACCESSION NUMBER:		0000895728-19-000069
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20190322
FILED AS OF DATE:		20190326
DATE AS OF CHANGE:		20190326

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			EBEL GREGORY L
		CENTRAL INDEX KEY:			0001186942

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-15254
		FILM NUMBER:		19704660

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			ENBRIDGE INC
		CENTRAL INDEX KEY:			0000895728
		STANDARD INDUSTRIAL CLASSIFICATION:	PIPE LINES (NO NATURAL GAS) [4610]
		IRS NUMBER:				000000000
		STATE OF INCORPORATION:			A0
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		200 425 - 1ST STREET SW
		CITY:			CALGARY
		STATE:			A0
		ZIP:			T2P 3L8
		BUSINESS PHONE:		403-231-3900

	MAIL ADDRESS:	
		STREET 1:		200 425 - 1ST STREET SW
		CITY:			CALGARY
		STATE:			A0
		ZIP:			T2P 3L8

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	IPL ENERGY INC
		DATE OF NAME CHANGE:	19940616

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	INTERPROVINCIAL PIPE LINE SYSTEM INC
		DATE OF NAME CHANGE:	19930108
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>wf-form4_155361649817092.xml
<DESCRIPTION>FORM 4
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2019-03-22</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000895728</issuerCik>
        <issuerName>ENBRIDGE INC</issuerName>
        <issuerTradingSymbol>ENB</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001186942</rptOwnerCik>
            <rptOwnerName>EBEL GREGORY L</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O ENBRIDGE INC.</rptOwnerStreet1>
            <rptOwnerStreet2>200, 425 1ST STREET SW</rptOwnerStreet2>
            <rptOwnerCity>CALGARY</rptOwnerCity>
            <rptOwnerState>A0</rptOwnerState>
            <rptOwnerZipCode>T2P 3L8</rptOwnerZipCode>
            <rptOwnerStateDescription>ALBERTA, CANADA</rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle></officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable></nonDerivativeTable>

    <derivativeTable>
        <derivativeTransaction>
            <securityTitle>
                <value>Deferred Stock Units</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <footnoteId id="F1"/>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2019-03-22</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>1818</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <footnoteId id="F1"/>
            </exerciseDate>
            <expirationDate>
                <footnoteId id="F1"/>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Shares</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>1818.0</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>15957</value>
                    <footnoteId id="F2"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">All non-employee directors receive a portion of their compensation in the form of Deferred Stock Units (&quot;DSUs&quot;), which represent notional shares with the same value as Enbridge Common Shares.  Such DSUs are fully vested at grant and are settled in cash upon retirement of the director based on the price of Enbridge Common Shares.  The DSUs have no expiration date.</footnote>
        <footnote id="F2">Includes 210 DSUs acquired by the Reporting Person between December 21, 2018 and March 22, 2019 pursuant to a dividend reinvestment feature under the Enbridge Inc. Directors' Compensation Plan.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/ Michelle Lowther, attorney-in-fact</signatureName>
        <signatureDate>2019-03-26</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
