It could be an abandoned cable going nowhere. In a case like this, I'd fully disconnect it and wait to see if anyone complains.
Follow along with the video below to see how to install our site as a web app on your home screen.
Note: This feature may not be available in some browsers.
Discuss RCD issue baffling me in the UK Electrical Forum area at ElectriciansForums.net
In a case like this, I would advise calling a decent electrician.It could be an abandoned cable going nowhere. In a case like this, I'd fully disconnect it and wait to see if anyone complains.
I had a more confusing version of this. Switching on a kitchen socket caused a RCD on a different CU to trip.I have a dual board consumer unit. Both sides have a RCD. The left hand side of the board has all the MCBs for all the 6 ring mains for the property. The right side of the board has the lighting and hob and cooker for the house.
Whenever a current is drawn from a socket the right side RCD trips, but not the left side. So my lights trip but sockets stay on. It happens on any of the 6 ring mains. And seems to be any appliance that draws a large current such as a hoover, kettle, immersion heater etc.
I do have a alarm system but I have totally isolated it by unwiring it front the spur it was connected to. Still the same issue.
I do also have under cabinet lights that are ran from a ring main... I have yet to investigate these.
The MCBs switched off were because they were just straight up tripping the right side RCD. Probably because they all had stuff like a fridge, boiler etc drawing current. The right hand side lighting circuit that is turned off also automatically trips the right RCD.
View attachment 118549
Electrician has tested each circuit and can't find a fault. The board has been wired correctly with no crossed over neutrals.
Anyone got any clue where to start some more fault finding? I am a ex Army Electrician, that was 17th ed trained... But that was about a decade ago but I know enough to be safe.
Cheers
Seen this where T&E has been fixed with a flat bend of too tight a radius.no visible damage at all but was faulty.
Reply to RCD issue baffling me in the UK Electrical Forum area at ElectriciansForums.net