The earth is 25mm and the supply is 35mm, it is 100A, not sure of the meter type. All i noted was that it was singed slightly.
There is a boiler and A/C system It used to have a commercial kitchen for the staff canteen that was all steel I think it was bonded to the spare terminal. It is the only thing we have found so far in this building and we are suprised as it all seems to have been done really well.
Are Federal Electric Stab-Lok panels OK? just imagine if they were of the no-trip kind, live kitchen and taps!
incidentally, we were logging voltage swings on a UPS from about 218V to 280V, we had the panel and supply checked and it all seems ok, I wonder if the poor earth might have confused the UPS.
