| CERTIFICATION                                    |
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| I,                JAMES H. MILLER, certify that: |
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| 1.                                               | I                have reviewed this quarterly                report on Form                10-Q                of PPL Energy Supply, LLC                (the "registrant"); |
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| 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; |
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| 3.                                               | Based                on my knowledge, the                financial statements, and other financial information included in                this                report, fairly present in all material respects the                financial condition,                results of operations and cash flows of the registrant as of, and                for, the                periods presented in this report; |
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| 4.                                               | Theregistrant's                other certifying officer and I                are responsible for establishing and maintaining disclosure controls                and                procedures (as defined in Exchange Act Rules 13a-15(e)                and 15d-15(e))                for the registrant and                have: |
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|                                             | a. | Designed                such disclosure controls                and procedures, or caused such disclosure controls and procedures                to be                designed under our supervision, to ensure that material information                relating to the registrant, including its consolidated subsidiaries,                is                made known to us by others within those entities, particularly during                the                period in which this report is being prepared; |
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|                                             | b. | Evaluated                the effectiveness of the                registrant's                disclosure controls and                procedures and presented in this report our conclusions about the                effectiveness of the disclosure controls and procedures, as of the                end of                the period covered by this report based on such evaluation;                and |
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|                                             | c. | Disclosed                in this report any                change in the registrant's                internal control over financial                reporting that occurred during the registrant's                most recent fiscal quarter (the                registrant's                fourth quarter in the case of an                annual report) that has materially affected, or is reasonably likely                to                materially affect, the registrant's                internal control over financial                reporting; and |
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| 5.                                               | Theregistrant's                other certifying officer and I                have disclosed, based on our most recent evaluation of internal control                over financial reporting, to the registrant's                auditors and the audit committee                of the registrant's                board of directors (or persons                performing the equivalent functions): |
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|                                             | a. | All                significant deficiencies and                material weaknesses in the design or operation of internal control                over                financial reporting which are reasonably likely to adversely affect                the                registrant's                ability to record, process,                summarize and report financial information; and |
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|                                             | b. | Any                fraud, whether or not                material, that involves management or other employees who have a                significant role in the registrant's                internal control over financial                reporting. |
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| Date:  November                1, 2007 | /s/  James                H. Miller |
|                                             | James                H. MillerPresidentPPL                Energy Supply, LLC |