A spokesman for the state firm said he was not aware that such an announcement was scheduled.

Eskom , which supplies virtually all of the power for Africa's most advanced economy, has been embroiled in governance and graft crises and has delayed its interim results, a move that could see trading of its debt suspended on the Johannesburg bourse.

Finance Minister Malusi Gigaba said on Thursday the Treasury could not afford to bail the firm out but would take unspecified action soon to tackle the company's challenges.

(Reporting by Nqobile Dludla; editing by John Stonestreet)