Quote Originally Posted by journeyman Mick View Post
I put everything back the way it was this morning and called the supplier. They sent a crew out who checked the supply and found it had been connected the wrong way (left hand rotation). They climbed up the pole and swapped the phases over so now everything is as it should be, with all the machines running the way they were before the power supply was changed. They tested the saw's circuit and it was okay. They also tested the saw's wiring with a megger and they couldn't see why it was tripping the breaker.

I'm going to see if I can get the sparky next door to check it out for me. Don't have time just now to test the readings on those circuits as I've got a couple of BAS statements I need to do, I don't think they'll give me a second extension. I'll post results when I can.

Mick

All I have to say Mick is that the supplier is very lucky that they didn't do more damage. A mistake like that in an industrial area could cost them millions.

Good luck with it.