Exhibit 99(a)


                             TXU US HOLDINGS COMPANY
                       Certificate Pursuant to Section 906
                         of Sarbanes - Oxley Act of 2002


       The undersigned, Erle Nye, Chairman of the Board and Chief Executive of
TXU US HOLDINGS COMPANY (the "Company"), DOES HEREBY CERTIFY that:

     1.   The Company's Current Report on Form 8-K related to TXU Energy Company
          LLC filed on or about  November 21, 2002 ("the Report") fully complies
          with the  requirements  of  section  13(a) or 15(d) of the  Securities
          Exchange Act of 1934, as amended; and

     2.   Information  contained in the Report fairly presents,  in all material
          respects,  the  financial  condition  and results of operations of TXU
          Energy Company LLC.

      IN WITNESS WHEREOF, the undersigned has caused this instrument to be
executed this 21st of November, 2002.





                                              /s/ Erle Nye
                                       ------------------------------------
                                       Name:  Erle Nye
                                       Title: Chairman of the Board
                                              and Chief Executive