RCD keeps tripping

Question

My RCD keeps tripping and I can't find anything obvious that's doing it. Most of the appliances have been unplugged and I still can't figure it out. The entire system trips and not just a single fuse. Does anyone have any advice on how to find the fault?

Ashley · Accepted Answer

Remove every single thing plugged in from the sockets and reset the RCD. Then plug things back in one by one and see if it trips.

Daniel · Answer

Switch off all circuits then reinstate the RCD. The RCD should no longer trip. Then reinstate each individual circuit one by one and when switching up the faulty circuit RCD should trip. You now know what circuit is the cause of the issue. Leave that switched off and reinstate all other circuits. Check on fuse board to see what circuit is the issue. That will then narrow down your search as well as enabling other circuits.

Leonard · Answer

Hi, this could be the faulty RCD itself. They are only by manufacturer instructions supposed to trip a set amount of times. Difficult to answer without seeing this. 

What circuits are on the side that trip? Does the RCD cover all the circuits or is it a split board (2 RCDs covering two lots of circuits) 

The side that trips, does this by any chance have a light circuit on it? Or any outside lights? 

Lumia

Paul · Answer

Get an electrician to come over and have a look at it! 
Needs to be inspected by a QUALIFIED Electrician instead of someone "having a go at it "!!

Muhammad · Answer

There could be a potential earth leakage to. If all appliances are unplugged then it seems like earth leakage between the cables.

Jamie · Answer

First of all put all the small mcb down and unplug everything then turn the rcd up and hopefully it holds if it does then slowly start lighting up the mcb one at a time if it trips when you put a certain one up this will tell you what circuit Is the problem.

Adrian · Answer

Call out an electrican as there are a lot of probable causes, all of which must be checked by a domestically qualified electrician.

Christopher · Answer

Sounds like an earth fault. You should hire a competent electrician to fault find the problem that is causing one of of your rcd's inside your consumer unit to trip.

Stephen · Answer

Nuisance tripping, faulty rcd. Water ingress somewhere, or mice somewhere, turn all circuit breakers off, see if rcd stays on, turn on 1 by 1 to eliminate.

Ionut · Answer

Hi. You need first to locate the circuit (fuse) where the fault appears. Turn down all fuses, put up the RCD and one after another put up each fuse. That will indicate the fault circuit. Usually, there is a wire, box or something that is wrong.

William · Answer

You will have to unplug everything and turn everything off then see if still tripping if so a test for insulation resistance will need carried out at the consumer unit but you must be qualified and have the equipment to carry out this test sounds like you have a short in a cable or faulty socket, switches etc.
The easiest way to repair is get a qualified electrician to check the fault out.

George · Answer

You need to hire a qualified Electrician to investigate and with a view to remedy the fault within scope; failing that give you quote to remedy the problem noted

Jason · Answer

Take the neutrals out for every circuit on that side of the rcd. Keep all the mcbs off. Once you have taken out each neutral, switch the rcd to on and it’ll stay up, Touch the mistral bar with each disconnected neutral cable that you had previously disconnected and eventually the problematic circuit will knock out the rcd. You then know which circuit is causing the issue.

RCD keeps tripping

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