Delmarva Power & Light 10-K/A 2011 FY Annual report (amended)

Exhibit 31.4

CERTIFICATION

I, Anthony J. Kamerick, certify that:

1. I have reviewed this report on Form 10-K/A of Potomac Electric Power Company; and

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report.

Date: March 5, 2012	/s/ A. J. KAMERICK
	Anthony J. Kamerick Senior Vice President and Chief Financial Officer