Stage 6 has kicked in since 1:30am on Sunday morning.
Eskom said loadshedding is due to multiple unit trips at Camden Power Station and will continue until further notice.
Eskom’s Daphne Mokwena said this measure followed the implementation of Stage 3, necessitated by multiple unit trips at Majuba Power Station and a unit trip at Medupi that resulted in a loss of 3 864 MW in generation capacity, while planned maintenance accounted for 7506 MW.
She said stage 6 was implemented to replenish emergency reserves and prepare for the week ahead.