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@Fox
Can I remove an RCD from a consumer unit myself or do I need to get someone in?
One of our two RCDs keeps tripping. It has five fuses linked to it: the sockets at the front of the house, the front lights, our oven, doorbell and a separate single socket. So every time it trips these all go off. It's one of these and 63A seems plenty even with an oven on the circuit - the rest is LED lights, the odd phone charger and a hi-fi:
https://www.screwfix.com/p/mk-sentry-63a-30ma-dp-type-ac-rcd/86634
I originally thought there was a problem with the sockets, but last night with just the lights fuse on (and no lights on, as we were out) it tripped. This morning I managed to get it working with just the sockets, but then it tripped very quickly. This was when I was using something, but all previous trips have been when we're not really using stuff, just a few LED lights on etc. and we weren't switching anything on/off.
As it seems to trip regardless of which fuses are switched on, I suspect the RCD. Although our builder reckons it's unusual for them to fail and a quick Google supports this.
Therefore I'd like to swap the two RCDs we have to see if the problem is with the RCD or the wider circuit - especially as I just checked and a new RCD is £40 at Screwfix - but I don't know how to do that. It seems to involve taking the consumer unit apart to some degree which I don't fancy. Do I need to get someone in?
I'd ask our builder but when I spoke to him yesterday he was home sick so I don't want to bother him...