I had another encounter with this guy again this week.
He had been back to do some testing on my installation. He didn't like the fact I had a heater connected to an FCU which was a spur from a ring main.
I argued that it was a last minute change of specification after first fix and after the place was plasterboarded so no chance of running a separate circuit (I am well aware of the requirement for a dedicated circuit for a heater) so it was the best I could do, and it was noted as a deviation.
A "discussion" then ensued where he told me it was "unsafe" and would I stand up in court when the house burnt down.
I said, it would be perfectly okay if that had been a single 13A socket as a spur from a ring, and someone plugged in a 3KW free standing heater, so the fact it was a 2KW heater that happened to be screwed to the wall and fed from an FCU does not make it "unsafe", and I would be happy to stand up in court and say so.
Now this is where he lost any credability in my book, he said "you can't run a 3KW heater from a 13A plug" Yeah right, his understanding of ohms law is different to mine then.
It became clear that as "DNO" he was going to pull the plug if I didn't "fix" it. So the "solution" we came up with was re route the dedicated feed for the gas water heater to supply the room heater, and make the feed to the gas water heater the FCU from the ring main.
Anyway, I think the job is finally completed. I'll think twice if any more jobs for the same estate come up, as it's got too much annoyance factor.
P.S
He also complained that one ring final was not complete, but when asked to show me, was unable to replicate his findings, and when I re testing that complete ring, including measuring R1+R2 at every socket, failed to find anything wrong with it.
P.P.S
The builder thinks this is sour grapes as apparently this other sparks normally gets all the wiring jobs on the estate, so we have trodden on his toes, and he's just trying to make life awkward for us because of that.