UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

Date of Report (Date of earliest event reported):  May 22, 2013 (May 17, 2013)

NSTAR ELECTRIC COMPANY

(Exact name of registrant as specified in its charter)

Registrant’s telephone number, including area code: (617) 424-2000

Not Applicable

(Former name or former address, if changed since last report.)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

o

Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

o

Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

o

Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

o

Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Section 2         Financial Information

Item 2.03

Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant.

On May 17, 2013 NSTAR Electric Company (“NSTAR Electric”) issued $200,000,000 aggregate principal amount of its Floating Rate Debentures due May 17, 2016 (“Debentures”) pursuant to an Underwriting Agreement, dated May 14, 2013, between Barclays Capital Inc. and RBC Capital Markets, LLC and NSTAR Electric.  The Debentures were issued under an indenture dated as of September 1, 1988, between NSTAR Electric (formerly Boston Edison Company) and The Bank of New York Mellon Trust Company, N.A. (as successor to The Bank of New York, as successor to Bank of Montreal Trust Company), as trustee. NSTAR Electric has registered its Debentures with the U.S. Securities and Exchange Commission under the Securities Act of 1933, as amended, pursuant to a Registration Statement on Form S-3 (Commission file no. 333-188345-03).

The Debentures mature on May 17, 2016, and bear interest at LIBOR plus 0.24%, payable quarterly on May 17, August 17, November 17 and February 17 of each year, commencing August 17, 2013.  Interest on the Debentures will accrue from May 17, 2013, and will be computed on the basis of a 360-day year and the actual number of days elapsed in each quarterly interest period.

Section 9

Financial Statements and Exhibits

Item 9.01

Financial Statements and Exhibits.

(d)

Exhibits.  

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SIGNATURE

Pursuant to the requirements of the Securities and Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

NSTAR ELECTRIC COMPANY

(Registrant)

May 22, 2013

By:

/S/ PHILIP J. LEMBO

Philip J. Lembo

Vice President and Treasurer

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EXHIBIT INDEX