Johannesburg - The Zondo commission resumes this morning hearing testimonies from Eskom employees.
Eskom employees Gert Opperman and Johan Bester are expected to take the stand.
On Monday, the commission enters its third week of probing the power utility and deputy chief justice Raymond Zondo, who chairs the inquiry, has heard from several Eskom witnesses.
So far the commission has dealt with the controversial Huarong deal and Eskom's involvement in coal mining with the Gupta family's Tegeta company.
On Friday, Opperman admitted to the inquiry that it seemed like Eskom's interaction with Optimum coal under Tegeta was different. It differed from the power utility's interaction with the same mine while it was owned by mining giant Glencore.
Glencore sold Optimum Holdings to Gupta linked Tegeta in late 2015 after it was slapped with coal fines worth over R2 billion. Glencore had to place Optimum under business rescue when then Eskom CEO Brian Molefe refused to renegotiate the coal supply agreement between Eskom and Glencore.