City Power says maintenance work in Midrand and Roodepoort aims to reduce unplanned outages during winter. City Power has announced that scheduled maintenance work will affect electricity supply in parts of Johannesburg this week. Why the maintenance was neededCity Power spokesperson Isaac Mangena said the work targeted ageing infrastructure that needed regular servicing. “Customers are advised to treat all electrical supply points as live at all times during the interruption period, as power supply may be restored earlier than anticipated,” he said. “Customers are also encouraged to unplug appliances during the outage to avoid possible damage when electricity supply is restored,” Mangena said.