Eskom did not foresee a need for rolling power cuts on Wednesday, although the electricity system remained constrained.

"Should we experience an unanticipated fault, there might be the need to implement load shedding," Eskom's media desk said.

The power utility's board chairperson Zola Tsotsi is heading a probe into Eskom's problems, including poor performance of power stations, delays in bringing in the new Medupi station, and cash flow problems.

Last week, Public Enterprises Minister Lynne Brown suspended four senior Eskom executives, including its CEO Tshediso Matona.

According to Tsotsi, the four's suspension was aimed at ensuring the inquiry was transparent and uninhibited.

On Tuesday, Democratic Alliance MP Natasha Mazzone criticised the decision to have Tsotsi heading the probe, saying Brown should rather appoint an independent body to look into Eskom's problems.