Exhibit 12.2

POTOMAC ELECTRIC POWER COMPANY

			For the Year Ended December 31,
	Three Months Ended March 31, 2013		2012		2011		2010		2009
	(millions of dollars)
Earnings
Net income for common stock	$	23	$	126	$	99	$	108	$	106
Preferred stock dividend		—		—		—		—		—
(Income) or loss from equity investees		—		—		—		—		—
Minority interest loss		—		—		—		—		—
Income tax expense		2		48		36		37		76
Pre-tax income for common stock		25		174		135		145		182
Add: Fixed charges*		29		113		111		111		114
Add: Distributed income of equity investees		—		—		—		—		—
Subtract: Interest capitalized		—		—		—		—		—
Subtract: Pre-tax preferred stock dividend requirement		—		—		—		—		—
Earnings	$	54	$	287	$	246	$	256	$	296
*Fixed Charges
Interest on long-term debt	$	26	$	101	$	97	$	97	$	99
Interest capitalized		—		—		—		—		—
Other interest		—		—		—		—		—
Amortization of debt discount, premium, and expense		1		5		4		4		4
Interest component of rentals		2		7		10		10		11
Pre-tax preferred stock dividend requirement		—		—		—		—		—
Fixed charges	$	29	$	113	$	111	$	111	$	114
Ratio of earnings to fixed charges (a)		1.86		2.54		2.22		2.31		2.60

(a) Pepco has no preferred equity securities outstanding, therefore the ratio of earnings to fixed charges is equal to the ratio of earnings to combined fixed charges and preferred stock dividends.