**Exhibit        31(b)**

**TXU        ENERGY COMPANY LLC**

**Certificate        Pursuant to Section 302 **

**of        Sarbanes - Oxley Act of 2002**

**CERTIFICATION        OF CFO**

| 1.   | I                have reviewed this quarterly report on Form 10-Q of TXU Energy Company                LLC; |
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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.   | The                registrant’s other certifying officer(s) 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 fiscal 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.   | The                registrant’s other certifying officer(s) 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: August              8, 2006 |                                                                                                                                           |                                    /s/  David A. Campbell |
|                                   | Signature:                David A. Campbell                                                                                               |
|                                   | Title:                         Manager and Acting Chief Financial              Officer  |