The power utility said the system remains vulnerable and while they have returned units to the system, they lost additional generating units on Thursday necessitating load-shedding on Friday.

On Wednesday, President Cyril Ramaphosa said sabotage at the power utility is partly to blame for load-shedding.

Ramaphosa said decisive action needs to be taken against the sabotage at Eskom.

Eskom has asked that customers reduce their use of electricity as a decrease in collective demand would ease the load on the system.

eNCA