Exhibit 12

NSTAR Electric Company and Subsidiary

Ratio of Earnings to Fixed Charges

(Unaudited)

	Three Months
	Ended
	March 31,			For the Years Ended December 31,
(Thousands of Dollars)	2014			2013			2012			2011			2010			2009
Earnings, as defined:
Net income	$	58,087		$	268,546		$	190,242		$	252,494		$	248,575		$	240,691
Income tax expense	39,234			172,866			123,966			165,686			162,020			151,224
Equity in earnings of regional nuclear generating and transmission companies	40			(550		)	(412		)	(501		)	(836		)	(891		)
Dividends received from regional equity investees	—			344			286			676			669			1,661
Fixed charges, as below	21,759			73,115			72,364			76,219			77,902			84,826
Less: Interest capitalized (including AFUDC)	(144		)	(511		)	(259		)	(185		)	(108		)	76
Total earnings, as defined	$	118,976		$	513,810		$	386,187		$	494,389		$	488,222		$	477,587
Fixed charges, as defined:
Interest on long-term debt (a)	$	20,756		$	79,088		$	87,100		$	90,040		$	90,630		$	83,261
Interest on rate reduction bonds	—			399			3,585			7,226			11,235			18,833
Other interest (b)	304			(9,104		)	(20,631		)	(27,839		)	(30,475		)	(24,519		)
Rental interest factor	555			2,221			2,051			6,607			6,404			7,327
Interest capitalized (including AFUDC)	144			511			259			185			108			(76		)
Total fixed charges, as defined	$	21,759		$	73,115		$	72,364		$	76,219		$	77,902		$	84,826
Ratio of Earnings to Fixed Charges	5.47			7.03			5.34			6.49			6.27			5.63

(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.