An Eskom employee died on Wednesday, and another rushed to the hospital with serious injuries after an incident on Unit 5 of the Lethabo power station in the Free State.
Eskom said it was investigating what they called a major incident.
As a result of the rupture of the main steam pipe, the unit is not operational.
Meanwhile, an Eskom customer network centre or depot in Orange Farm, Gauteng, was evacuated earlier on the same day after protesters damaged buildings and vehicles.
The protesters are against audits being done on electrical installations and the removal of illegal connections.
The Utility has experienced similar protests in other parts of Gauteng, with the most recent incidents happening in Diepsloot, Protea Glen, Katlehong, and Winterveldt.
Orange Farm area has been experiencing power outages in recent months due to overloading of transformers, which usually explode due to pressure from illegal connections.
