Exhibit 99(b)

                             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  Quarterly  Report  on Form  10-Q for the  quarter  ended
   September  30, 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 operation of the Company.

     IN WITNESS  WHEREOF,  the  undersigned  has caused  this  instrument  to be
executed this 14th day of November, 2002.




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