Streetlights were out across parts of Whanganui last Sunday, with Whanganui District Council receiving multiple after-hours calls.
Council transport manager Damian Wood said Powerco turned on streetlights by sending a signal through the power lines.
That activated 40 switches which controlled various areas of Whanganui.
“If multiple streetlights are out, it means the signal hasn’t come through properly due to an issue with relay equipment,” he said.
“Our contractor called the Powerco representative and requested that the signal be sent again.“