Well, what a pullava.
Electrician came at 7.30 am, bang on time. Did all the tests, told me what he was doing as he went, interesting, but soon forgotten !
Wiring is still very good, no problems there and no need to change it.
Switch i put in is fine, no issues there.
Fuse seemed ok whilst he was here, re-set and shower ran for 1o mins onhot - then tripped.
He concluded that whilst it could be the MCB it was more likely to be the shower.
Triton came out today, a different engineer.
Says the shower is abosultely fine, and is 100% it is the MCB - ran the shower on the mcb next to it, which is only 32amp, and it ran no problem. Fitted it back to the 40amp one, tripped straight away.
First electrician says he has not seen the make of fusebox - protek - and says it doesn`t look good. Not sure he can get an MCB for it.
Luckily, other mate who is an electrician knows someone who sells loads of bits for all sort of makes, he has got a new MCB coming Monday for £8. Hopefully that will do the trick.
Whilst looking at the electrics, first electrician commented that there is no RCD, and the earth wires are 4mm, regs say they ought to be 10mm. Says no immediate need to upgrade, but something to think about.
Anyway, why does an MCB "wear out" ? it has never tripped before this episode, the light one trips whenever a bulb goes but is fine. Is it just one of those things, or does it suggest there must be a cause of the tripping ?