Exhibit 10.3

EXECUTION COPY

RETENTION PROGRAM FOR KEY EMPLOYEES OF PUBLIC SERVICE ENTERPRISE GROUP
INCORPORATED

The Retention Program for Key Employees of Public Service Enterprise Group
Incorporated is intended to reward selected officers and key employees of Public
Service Enterprise Group Incorporated (“Enterprise”) who continue to provide
services to Enterprise after the date of the Merger Agreement between Exelon
Corporation and Enterprise. This Program automatically incorporates all
applicable restrictions of the American Jobs Creation Act of 2004 (the “AJCA”)
and guidance issued by the Department of Treasury under the AJCA, and Enterprise
will amend the Program to the extent necessary to comply with such requirements.
The AJCA, which became law on October 22, 2004, provides that payments due to a
change in the ownership or effective control of the employer must comply with
guidance issued by the Department of Treasury. The AJCA and any Treasury
guidance issued to implement the AJCA may result in additional restrictions on a
Key Employee’s rights relating to compensation considered to be deferred under
this Program. The timing under which a Key Employee has a right to receive any
payment under the Program will automatically be modified, and a Key Employee’s
rights under the Program shall be limited as necessary to conform to any
requirements under the AJCA and such guidance.

Subject to the foregoing, the Program shall be operated and administered in
accordance with the following terms and conditions:

1.        DEFINITIONS.

a.   “Annual Base Salary” means the annual compensation, excluding bonuses,
commissions, overtime, incentive payments, perquisite allowances, non-monetary
awards, director fees and other fees, relocation expense reimbursements, auto
allowances, imputed income from group term life insurance, and any other
non-recurring items, paid to or on behalf of a Key Employee for services
rendered to Enterprise, before reduction for compensation deferred pursuant to
all qualified, nonqualified and cafeteria plans of Enterprise.

b.   “Cause” means (i) the willful and continued failure of a Key Employee
substantially to perform his duties, (ii) willful engagement in gross misconduct
materially and demonstrably injurious to Enterprise, (iii) willful violation of
Enterprise’s Standards of Integrity or other applicable corporate code of
conduct, or (iv) conviction of a felony. No act or failure to act on the part of
a Key Employee shall be considered “willful” unless it is done or omitted by the
Key Employee in bad faith or without reasonable belief that the Key Employee’s
action or omission was in the best interest of Enterprise.

c.   “Committee” means the Organization and Compensation Committee of the Board
of Directors of Enterprise.

d.   “Earned Date” means the date that is ninety (90) days after the Effective
Time.

--------------------------------------------------------------------------------

e.   “Effective Time” has the meaning ascribed to such term in the Merger
Agreement.

f.   “Key Employee” means an officer or key employee of Enterprise who meets the
requirements of eligibility for participation in the Program and who is selected
by the Committee to receive a Key Employee Retention Payment.

g.   “Key Employee Retention Payment” means the cash payment paid to Key
Employees and Qualifying Key Employees under the Program.

h.   “Merger Agreement” means the merger agreement between Exelon Corporation
and Enterprise, dated as of December 20, 2004.

i.   “Merger Agreement Date” means the date on which the Merger Agreement is
executed by Exelon Corporation and Enterprise.

h.   “Program” means this Retention Program for Key Employees of Enterprise.

h.   “Qualifying Key Employee” means those Key Employees who are continuously
employed with Enterprise and Exelon Corporation from the date of the Merger
Agreement through the Earned Date.

i.   All capitalized terms not otherwise defined herein shall be ascribed the
definition ascribed to each such term pursuant to the Merger Agreement.

2.        ELIGIBILITY. The Committee, in its sole discretion, shall select, from
those officers and key employees of Enterprise who are employed by Enterprise as
of the Merger Agreement Date, Key Employees to participate in the Program. The
Committee may delegate the selection of Key Employees who are not officers and
the establishment of Key Employee Retention Payments to the Chief Executive
Officer of Enterprise.

3.        AMOUNT. The Committee, in its sole discretion, shall determine the
total amount of the Key Employee Retention Payment to be paid to each Key
Employee, which amount shall not be less than 40% of the Key Employee’s Annual
Base Salary and shall not exceed 150% of the Key Employee’s Annual Base Salary.
For purposes of the Program, the amount of a Key Employee’s Annual Base Salary
shall be determined as of the Merger Agreement Date.

4.        PAYMENT SCHEDULE.

a.   Enterprise shall pay one half (1/2) of the Key Employee Retention Payments
to the respective Key Employees within sixty (60) days following the first
anniversary of the Merger Agreement Date.

b.   Not later than the first business day following the Earned Date, Exelon
Corporation shall pay the remaining amount of the Key Employee Retention
Payments to the respective Qualifying Key Employees.

2

--------------------------------------------------------------------------------

5.        PAYMENT CONDITIONED ON EXECUTION OF MERGER AGREEMENT.

a.   Key Employee Retention Payments shall be made if and only if the Merger
Agreement is executed by authorized representatives of Exelon Corporation and
Enterprise. In the event that the Merger Agreement is not executed, the Program
shall be null and void ab initio, all payments authorized by the Committee under
the Program shall immediately be cancelled, and no Key Employee shall have any
rights or entitlements under the Program.

b.   In the event that the Merger Agreement terminates for any reason, the
Program shall immediately terminate, all remaining payments authorized by the
Committee under the Program shall immediately be cancelled, and no Key Employee
shall have any rights or entitlements to further amounts under the Program.

6.        TERMINATION OF EMPLOYMENT. A Key Employee who incurs a termination of
employment prior to the first anniversary of the Merger Agreement Date shall not
be entitled to receive a Key Employee Retention Payment. A Key Employee who
incurs a termination of employment prior to the Earned Date shall not be
eligible to receive the portion of the Key Employee Retention Payment that is
paid after such date, provided that any Key Employee whose employment is
involuntarily terminated without Cause as of or prior to the Effective Time
shall be deemed to have remained employed through the Earned Date and shall be
treated as a Qualifying Key Employee for all purposes.

7.        ADMINISTRATION. The Program shall be administered by the Committee (or
any successor thereto) consistent with the purpose and terms of the Program. The
Committee (and any successor thereto) shall have full power and authority to
interpret the Program, to select the employees eligible to participate, to
determine the amount of Key Employee Retention Payments, and to make any other
determinations and to take such other actions as it deems necessary or advisable
in carrying out its duties under the Program, including the delegation of such
authority or power, where appropriate. All decisions and determinations by the
Committee (or any successor thereto) shall be final, conclusive and binding on
Enterprise, Exelon Corporation, all employees and any other persons having or
claiming an interest hereunder.

8.        AMENDMENT AND TERMINATION.

a.   The Program may be amended by the Committee at any time; provided that no
amendment shall cause any Key Employee not to be covered under the Program,
reduce the amount of any Key Employee Retention Payment, or in any other manner
adversely affect the rights of any Key Employee to a Key Employee Retention
Payment. Notwithstanding the foregoing, if the Key Employee Retention Payments
are deemed to be “deferred compensation” subject to Section 409A of the Internal
Revenue Code of 1986, as amended, the Program shall be deemed to be amended as
necessary to conform such payments to the requirements of Section 409A.

3

--------------------------------------------------------------------------------

b.   The Key Employee Retention Program shall terminate when the total amount of
all Key Employee Retention Payments have been paid to the respective Key
Employees or their beneficiaries.

9.        MISCELLANEOUS.

a.   Benefits provided under the Program shall be in addition to any increased
payments or accelerated vesting available under any other employee benefit plan,
program or arrangement, including an individual employment agreement.

b.   No Key Employee Retention Payment shall be taken into consideration for the
calculation of any pension, severance or other benefit under any employee
benefit plan, program or arrangement.

c.   The right of a Key Employee to receive a Key Employee Retention Payment
shall not be deemed a right to continued employment prior to, on or after the
Effective Time or the Earned Date, and shall not entitle the Key Employee to
additional retention payments under any other retention program implemented by
Enterprise or Exelon Corporation.

d.   No person shall have the power or right to transfer (other than by will or
the laws of descent and distribution), alienate or otherwise encumber such
person’s interest under the Key Employee Retention Program. The provisions of
the Program shall inure to the benefit of each Key Employee and the Key
Employee’s beneficiaries, heirs, executors, administrators and successors in
interest.

e.   Enterprise and Exelon Corporation may make such provisions and take such
action as they may deem necessary or appropriate for the withholding of any
taxes that Enterprise or Exelon Corporation believe to be required by any law or
regulation of any governmental authority, whether Federal, state or local, to
withhold in connection with any Key Employee Retention Payment.

f.   Key Employee Retention Payments shall not, in the aggregate, exceed
$10,000,000. The cost of the first installment of Key Employee Retention
Payments shall be borne by Enterprise. All remaining costs and expenses of the
program shall be borne by Exelon Corporation.

g.   Following the Effective Time, the Program shall be binding on Exelon
Corporation to the same extent as if Exelon Corporation had expressly assumed
the Program.

k.   The Program and all determinations made and actions taken under the Program
shall be governed by the laws of New York (excluding the choice of law
provisions thereof).

l.   If any provision of the Program is held unlawful or otherwise invalid or
unenforceable, in whole or in part, the unlawfulness, invalidity or

4

--------------------------------------------------------------------------------

unenforceability shall not affect any other parts of the Program, which parts
shall remain in full force and effect.

5

--------------------------------------------------------------------------------