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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
Originator-Key-Asymmetric:
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 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 H9idQYZpWgIuO38aUasxjoK87pmxNu8e+KY2kijUELvQD51BRdSFJ0vNCafrwje2
 EX1dyJljaFRA9JnjWIIeXw==

<SEC-DOCUMENT>0000205716-05-000021.txt : 20050125
<SEC-HEADER>0000205716-05-000021.hdr.sgml : 20050125
<ACCEPTANCE-DATETIME>20050125153258
ACCESSION NUMBER:		0000205716-05-000021
CONFORMED SUBMISSION TYPE:	3
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20050117
FILED AS OF DATE:		20050125
DATE AS OF CHANGE:		20050125

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			CONNECTICUT LIGHT & POWER CO
		CENTRAL INDEX KEY:			0000023426
		STANDARD INDUSTRIAL CLASSIFICATION:	ELECTRIC SERVICES [4911]
		IRS NUMBER:				060303850
		STATE OF INCORPORATION:			CT
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		SELDEN STREET
		CITY:			BERLIN
		STATE:			CT
		ZIP:			06037-1616
		BUSINESS PHONE:		8606655000

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Necci Raymond P
		CENTRAL INDEX KEY:			0001315105

	FILING VALUES:
		FORM TYPE:		3
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-00404
		FILM NUMBER:		05547108

	BUSINESS ADDRESS:	
		BUSINESS PHONE:		860-665-5706

	MAIL ADDRESS:	
		STREET 1:		NORTHEAST UTILITIES
		STREET 2:		107 SELDEN STREET
		CITY:			BERLIN
		STATE:			CT
		ZIP:			06037
</SEC-HEADER>
<DOCUMENT>
<TYPE>3
<SEQUENCE>1
<FILENAME>primary_doc.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>3</documentType>

    <periodOfReport>2005-01-17</periodOfReport>

    <noSecuritiesOwned>0</noSecuritiesOwned>

    <issuer>
        <issuerCik>0000023426</issuerCik>
        <issuerName>CONNECTICUT LIGHT &amp; POWER CO</issuerName>
        <issuerTradingSymbol>CL&amp;P</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001315105</rptOwnerCik>
            <rptOwnerName>Necci Raymond P</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>NORTHEAST UTILITIES</rptOwnerStreet1>
            <rptOwnerStreet2>107 SELDEN STREET</rptOwnerStreet2>
            <rptOwnerCity>BERLIN</rptOwnerCity>
            <rptOwnerState>CT</rptOwnerState>
            <rptOwnerZipCode>06037</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>President &amp; COO - CL&amp;P</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeHolding>
            <securityTitle>
                <value>CL&amp;P Preferred Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>0</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <ownerSignature>
        <signatureName>/s/ Raymond P. Necci</signatureName>
        <signatureDate>2005-01-25</signatureDate>
    </ownerSignature>
</ownershipDocument>

</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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