23/11/2010 Eskom CEO Brian Dames during an announcement of their interim financial results at Sunninghill JHB. (881) Photo: Leon Nicholas

Johannesburg -

South Africa's power supply remains constrained, Eskom CEO Brian Dames said on Tuesday.

“We are not out of the woods yet, the system remains tight and vulnerable to any changes as we go into winter,” he told journalists in Johannesburg.

The persistent rainfall had resulted in wet coal that made it impossible to power the stations, Dames said.

Last week, the power utility introduced emergency rostered power cuts in certain areas, called load shedding, to prevent a collapse of the national power grid because coal supplies for electricity generators became wet.

“The supply issues will be a problem for the next few months unless we have aggressive supply interventions of at least 3000 megawatts,” he said.

Power exports to neighbouring countries had been reduced by at least 10 percent so as to meet the domestic supply constraints.

Dames has resigned as CEO and will leave the power utility at the end of March. - Sapa