050910 Electricity pylons carry power from Cape Town's Koeberg nuclear power plant July 17, 2009. South Africa will need 20 gigawatts (GW) of new power generation capacity by 2020 and would require double that amount a decade later to meet rising demand, the country's power utility said September 7, 2009. Picture taken July 17, 2009. REUTERS/Mike Hutchings (SOUTH AFRICA ENERGY BUSINESS)

Johannesburg - South Africa's power supply will be “extremely tight” over the next three days as employees of mines and factories go back to work and schools restart after the Christmas holidays, state-run utility Eskom said on Monday.

Power supplies are expected to be constrained in Africa's largest economy over the next two years as Eskom scrambles to bring new plants online to meet rising demand. - Reuters