Eskom says Stage 4 load shedding will continue throughout Thursday and Friday due to a lack of generating capacity.
The power industry says lower-level power outages are possible starting Saturday morning.
Spokesperson Sikanathi Mantshantsha says Eskom teams are working around the clock to get the devices back into service.
“Due to the shortage of generating capacity and the need for unscheduled maintenance to bring the units back into service, we unfortunately have to implement load shedding as a last resort.”
Mantshancha says generating capacity has been lost in Kendal and Majuba.
“The extension of the stage 4 load shedding is required due to further breakdowns at the generating units at Kendal and Majuba this morning due to leaking boiler tubes. Breakdowns over the past few days at three generating units at Kendal and Tutuka power stations, and a delayed unit return at Camden power station, continue to contribute to capacity constraints.”
Each phase of load shedding is estimated to cost the economy about half a billion rand per day.