Hi, We have a problem with our electrics, the RCD trips under load, eg, shower, cooker with all hobs on, sometimes washing machine. I have swapped out the RCD so that is not faulty, checked all plug sockets, (taken all plugs out and 1 by 1 put them in) nothing trips it, so nothing specific seems to trip it. There are 2 RCDs on the fuse box but only 1 of them trips and the main never trips. The problem is it doesnt seem to be anything specific doing it, only that it trips with big appliances. On occasions it trips during the night with nothing on as we have woke up with it tripped. Any ideas what the problem could be?