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Cheers Mike The socket is wired to a HBA B32 breaker which doesn't trip. The incoming feed comes through this RCD which is what's tripping. Would you suggest changing either/both? Just tried the extractor in another workshop and its working fine so definitely looks like mines the problem.

No speed control, not sure about soft start but don't think so. I think I'll drag it across to another workshop and see if it runs over there EDIT Just checked, its an induction motor

Thanks for the replies. Its a dust extractor. I got it second hand but is almost new & I know it was running fine before I got it. The plug was already fitted but I've checked the wiring and its as it should be. I had a problem with the rcd tripping before, it only ever happened with my 240v...

Hi I have a workshop with 3 phase electrics. The feed comes into an 30ma rcd then into the main board where it supplies my lights/sockets and 3 phase machines. Everything works fine except a new 240v 16a machine. Its plugged into a 16a socket but every time I press the start button it trips the...