NSTAR Electric Company												Exhibit 12
Ratio of Earnings to Fixed Charges
(Unaudited)
(Thousands of Dollars)		Three Months
		Ended
		March 31,	For the Years Ended December 31,
		2013		2012		2011		2010		2009		2008
Earnings, as defined:
Net income	$	48,122	$	190,242	$	252,494	$	248,575	$	240,691	$	223,897
Income tax expense		31,265		123,966		165,686		162,020		151,224		141,847
Equity in earnings of regional nuclear
generating and transmission companies		(85)		(412)		(501)		(836)		(891)		(820)
Dividends received from regional equity investees		102		286		676		669		1,661		416
Fixed charges, as below		16,549		72,364		76,219		77,902		84,826		103,661
Less: Interest capitalized (including AFUDC)		(113)		(259)		(185)		(108)		76		(1,926)
Total earnings, as defined	$	95,840	$	386,187	$	494,389	$	488,222	$	477,587	$	467,075
Fixed charges, as defined:
Interest on long-term debt (a)	$	19,592	$	87,100	$	90,040	$	90,630	$	83,261	$	76,793
Interest on rate reduction bonds		399		3,585		7,226		11,235		18,833		27,076
Other interest (b)		(4,068)		(20,631)		(27,839)		(30,475)		(24,519)		(9,789)
Rental interest factor		513		2,051		6,607		6,404		7,327		7,655
Interest capitalized (including AFUDC)		113		259		185		108		(76)		1,926
Total fixed charges, as defined	$	16,549	$	72,364	$	76,219	$	77,902	$	84,826	$	103,661
Ratio of Earnings to Fixed Charges		5.79		5.34		6.49		6.27		5.63		4.51
(a) Interest on long-term debt includes amortized premiums, discounts and capitalized expenses related to indebtedness.
(b) For the years ended December 31, 2011, 2010, 2009 and 2008, other interest includes interest related to accounting for uncertain tax positions.