Eskom implemented stage 2 load shedding at 8 am on Thursday till 10 pm.
It says in a statement that this is due to an increase in generation breakdowns.
It warned, however, that there is a high possibility that Stage 2 will be escalated to Stage 3 for the evening peak.
This constrained supply situation may persist through the weekend.
It says the delay in the return to service of two units at Duvha and Tutuka power plants and the breakdown of four units at Kriel, Tutuka and Kendal have resulted in the need for load shedding.
These units removed more than 2 000 Megawatts of power from the system
The power utility said its working hard to return as many of these units to service as possible.
