The New Zealand trade union is calling for people to do basic checks before calling power companies about outages.
E tū said that false complaints about power outages were causing delays in restoring power to those still affected by outages in the Auckland region.
Industry co-ordinator Joe Gallagher said the public is largely supportive of crews working around the clock to fix outages, and while most call-outs are genuine, some are not and that has put pressure on everyone working to reconnect Aucklanders.
"Some people ring up saying, "Our power's out," only to find that the main switch was left off at the meter board as a safety precaution by private electricians. So, the crews turn up, and there's no problem.
"But every time that happens, they can't respond to someone else who needs their help," he said.