Hello,
We have had a bathroom fitter (who is electrically qualified) replace an old (but fully functioning) 9kW shower with a new 8.5kW shower. Some additional cross-bonding work was done at the same time. I know that it involved bonding to the gas pipe and to the central heating pipes.
The old shower is and always was on its own circuit, with a 30A MCB and
30mA RCD.It now turns out that the new shower doesn't work - the 30mA RCD is tripping. The fitter decided to upgrade to 40A.
The shower manufacturers have visited and claim there is a fault in the wiring, not the shower. Given that we had no electrical problems before, can anyone think what might be wrong?
Thanks.
David.