Shiraaz Mohamed / AFP
JOHANNESBURG - Delays in returning ten generating units to service at several power stations have forced Eskom to escalate blackouts to stage 6 from 4pm.
Stage six power cuts will remain in place until 5am on Tuesday.
The power utility will then shift to stage 4 until 4pm.
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Eskom says this pattern will be repeated until it is able to regain some degree of stability.
Breakdowns have reduced generating capacity by about 751 megawatts.