Since last night (high winds and rain), one of the RCDs has been tripping with a loud bang every so often, perhaps 8 times last night. Any help is greatly appreciated. ... We have unplugged all appliances taken out all the fuses from spurs (To our knowledge) and it still trips when nothing is plugged in, Before we get an electicrian to rip open the walls to check cabling does anyone know anything else we could do? It is just the last MCB just puts it over the limit. The basic setup is a standard consumer unit in the kitchen with all circuit breakers split across 2 RCDs - No circuits which aren't covered by an RCD. A few weeks ago the main RCD started tripping, it would trip 5 or 6 times in quick succession and then settle down. Have a closer look at the switches on your fuse box to try and see which switch on the RCD (Residual Current Device) has broken the electrical circuit. I have checked all the wiring in the sockets to check if there is a problem with that - all ok. The problem with a MCB is it only turns off the line, the neutral is left connected. Then voila! Anyone have any idea why the rcd on the fusebox keeps tripping out? Your TV, your hair straighteners, your washing machine etc. This won't have blown a fuse in the past, but will trip an RCD. I have tried turning everything off and testing one by one to identify a problem appliance - not worked. As a safety switch is designed to shield people from an electric shock, if it has tripped that usually means there is a problem somewhere that needs to be addressed. Neutral, ground and hot should all register no continuity between each other with everything unplugged and all light witched off. I get an Ohms reading which I think confirms it is a ground fault. Yes, everything. Use each one and keep going until one of them triggers the RCD. Any ideas? It will be hard to track down though, as it could be anywhere. so all circuits are working. All my fridge, freezer and all sockets keep tripping after 5 - 20 secs, I've now unplugged everything except fridge n freezer as I can't get to them and Its still tripping? Some time later it would repeat the process. RCD keeps tripping with no MCB switched on. Now, go around and start plugging them back in one-by-one. As irritating as a tripping safety switch may be, it is only doing the job it is designed to do! I'm back there next weekend. Why does my safety switch keep tripping? I've unplugged everything from the sockets that keep blowing and it still trips. I was called in to try to resolve the fault, on first inspection I found that the RCD would not reset unless all mcb's were switched off, then reset RCD and switch each mcb individually. So start putting the MCB's in left to right and the last MCB on right may trip the RCD, but start putting the MCB's in right to left and the last MCB on the left can trip it. Rich I have unplugged everything and when the CB is switched on - this will cause the RCD to trip again. I have changed the RCD over to an empty one - this also trips (all others that are connected to the rest of the house are oK). If it re-sets then you know one of those appliances is causing the tripping. 0. I have a multimeter and have tested some of the plugs. If there are no signs as to which particular fuse has tripped, you will, unfortunately, have to unplug everything in the house and plug back in one at a time! I switched it back on this morning, it tripped a couple more times in the morning and 4+ times throughout the afternoon. I guess that means an internal wiring issue? rcd keeps tripping nothing plugged in - please help! My question is - is there a way to systematically find where the fault lies without having to take each plug out? I have a rcd tripping (ring main). Managed to wire everything up to the right hand RCD. Once everything is unplugged, go and re-set the RCD. 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