The company I'm subbing work for have taken over this job from another site temporary firm and it's been installed off the existing earth. I've been sent to test this supply but something's not right here. On my megger I've got L-L test which I was told was the best way to test a 3 phase supply?
I'm testing temporary site electrics at the moment and I'm abit confused as to why my readings are completely different. When I test my zs using 2 phases and earth my readings come out correct. When I test using phase neutral and earth I'm getting readings over 200 ohms. I'm thinking towards a...
