Eskom confirmed stage 2 load-shedding will continue into Friday morning.
The power utility says their systems remain constrained and unpredictable.
“Our emergency reserves are insufficient to meet the demands for electricity during the day,” Eskom said in a statement.
The utility asked customers to reduce demand.
After a round of overnight Stage 2 power cuts which ended at 6am on Wednesday morning, Eskom says the system remains vulnerable and there is a high likelihood of load shedding overnight.
“The load shedding that keeps coming is because of the maintenance challenges. “Those are known problems and we are addressing them. In the end, we will need to be maintaining those power stations so that we repair them and put them on a better footing,” Ramaphosa said.