Exelon Corporation

Section 16 Filing

Power of Attorney for 2007



Know all by these presents, that the undersigned hereby constitutes and

appoints each of Katherine K. Combs, Bruce G. Wilson, and Scott N. Peters,

signing singly, the undersigned's true and lawful attorney-in-fact to:



(1)  execute for and on behalf of the undersigned, in the undersigned's

capacity as an officer and/or director of Exelon Corporation ("Exelon"),

all reports to be filed by the undersigned pursuant to Section 16(a) of the

Securities Exchange Act of 1934 and the rules promulgated thereunder

(including Forms 3, 4, and 5 and any successor forms)

(the "Section 16 Reports");



(2)  do and perform any and all acts for and on behalf of the undersigned

that may be necessary or desirable to complete and execute any such Section 16

Report, complete and execute any amendment or amendments thereto, and timely

file such report with the United States Securities and Exchange Commission

and any stock exchange or similar authority; and



(3)  take any other action of any type whatsoever in connection with the

foregoing that, in the opinion of such attorney-in-fact, may be of benefit

to, in the best interest of, or legally required by, the undersigned, it

being understood that the documents executed by such attorney-in-fact

on behalf of the undersigned pursuant to this Power of Attorney shall be in

such form and shall contain such terms and conditions as such attorney-in-fact

may approve in such attorney-in-fact's discretion.



The undersigned hereby grants to each such attorney-in-fact full power and

authority to do and perform any and every act and thing whatsoever requisite,

necessary, or proper to be done in the exercise of any of the rights and

powers herein granted, as fully to all intents and purposes as the undersigned

might or could do if personally present, with full power of substitution or

revocation, hereby ratifying and confirming all that such attorney-in-fact,

or such attorney-in-fact's substitute or substitutes, shall lawfully do or

cause to be done by virtue of this power of attorney and the rights and powers

herein granted.  The undersigned acknowledges that the foregoing

attorneys-in-fact, in serving in such capacity at the request of the

undersigned, are not assuming, nor is Exelon assuming, any of the

undersigned's responsibilities to comply with Section 16 of the Securities

Exchange Act of 1934.



This Power of Attorney shall remain in full force and effect until the

undersigned is no longer required to file Section 16 Reports with respect

to the undersigned's holdings of and transactions in securities issued by

Exelon, unless earlier revoked by the undersigned in a signed writing

delivered to the foregoing attorneys-in-fact.



IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney

to be executed  as of this 4th day of May, 2007.



Signature: /S/ Stephen D. Steinour





Print Name:  _      Stephen D. Steinour     __