The central, northern and western areas of Namibia experienced an electricity blackout on Friday night. A statement issued by Nampower said the cause of the outage was yet to be determined. The power failure started at 21h04 and power was restored in phases with Windhoek reconnected two-hours later. NamPower said the Auas/Kokerboom 400 kilovolt (kV) line, the major transmission line that feeds power to the central parts of Namibia, tripped. The areas south of Mariental were not affected by the outage. The northern areas including the Zambezi Region, Otjiwarongo, and Outjo were not affected by the outage as they are fed by a separate direct current link which runs from the Zambezi sub-station outside Katima Mulilo to the Gerus sub-station outside Otjiwarongo. In June, most parts of Namibia were left without electricity for 20 minutes when the Aries/Kokerboom line, the main supply route of electricity between Namibia and South African power utility Eskom – tripped. Three-months ago, most parts of Namibia also experienced a power outage for about two hours during the commissioning of a generator at the Ruacana Power Station in the Kunene Region.