Re: Tell us about your faults !
Got called out to a house where: they were getting shock from shower while standing in the bath, the rcbo for kitchen circuit constantly tripped out, and some lights glowed a little even when switched off.
On investigating inside CU I found I had no voltage between L & E, although still had 240 between N & E and L & N. In the end I concluded that I had a live incoming earth (TNS supply)! Seemed to me this had to be the result of 2 faults on supply side - one to break the earth continuity back to sub-station, and one nearer the property to connect the live supply to earth - otherwise sub-station fuse would have blown.
I disconnected earth, put in earth rod an connected up as temporary TT, and told customer not to touch the earth until DNO had been as I couldn't think how I could disconnect it. Just glad I hadn't touched the earth as it was live back to sub-station fuse!
btw - DNO did find 2 faults - one each side of the front garden wall