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Thanks apprentice87 and everyone else. I am digesting your comments and will speak with my manager to discuss the best thing to do next. I really would like to resolve these problems but I am not experienced with welding sets.

No not recently qualified, unless 7 years in recent. I primarily do PIRs of commercial properties, never before a welders yard. Its obvious it needs a comprehensive PIR which I will be doing tomorrow, I have already called the DNO today and they are unable to confitm the supply type. I would...

Sorry if my terminology is wrong. PIR I mean to be a Periodic Inspection Report. Don't know what EDN'S are, forgive my ignorance. I do not know with any certainty the type of earthing supply, the Ze at origin is 0.29Ohms and the highest Zs i measured was 0.53Ohms at an isolator approx 7-10...

Hi All, I attended a welders yard today with numerous electrical problems. Very old insatallation in poor condition, never had a PIR and no sign of any maintenance, a total mess. Firstly they had a large 3 phase pillar drill whose metal casing went live when switched on. I found a short...