Power utility Eskom will implement Stage 1 loadshedding from 05:00 to 16:00 and Stage 3 loadshedding from 16:00 to midnight on Wednesday and Thursday.

Stage 3 loadshedding will also be implemented from 16:00 to midnight on Tuesday.

"The implementation of Stage 1 loadshedding is due to an increase in generation unit failures," the utility says.

Breakdowns currently amount to 14 991 MW of generating capacity while the generating capacity out of service for planned maintenance is 4 264 MW.

Over the past 24 hours, a generating unit each at Grootvlei, Kriel and Matla power stations was returned to service.

In the same period, a generation unit each at Majuba and Tutuka power stations was taken out of service due to breakdowns.

The delay in returning to service a generating unit at Tutuka Power Station is contributing to the current capacity constraints.