Timnofinger
New member
Recently moved into this old house which was completely rewired in about 2000. It has a Hager 12 way CU with type C MCBs. The RCD, rated at 30ma, is randomly tripping 2 or 3 times a day. None of the MCBs trip and we have driven ourselves mad disconnecting appliances and turning off circuits to identify the source of the problem. My understanding is there is likely an earth leakage on the neutral side which may be cumulative from more than one source. An electrician friend of a friend, no longer practicing, suggested replacing CU with RCBOs but thought this might not solve the problem but at least identify the circuit at fault. Alternative would be to get an electrician to test the individual circuits, but I don't know what would be involved and how long this would take. Money is tight so I would appreciate advice on how to proceed, specifically how to identify the level of electrician able to undertake a forensic investigation if that seems most suitable. Thanks for any advice.