rcd tripping

  1. A

    RCD TRIPPING - ADVICE PLEASE

    Hi, Recently got called to a job, a problem with the RCD tripping. Went through the usual procedures of unplugging everything however I realised it wasn't just tripping on one circuit. It trips if you turn the shower on, plug something into the cooker switch and if you plug something into the...
  2. J

    RCD Tripping - Advice Needed

    Hi Everyone, So basically like a few other people, I really need some advice from some professional electricians and found this forum so I really hope someone out there can help. Basically we had a hot tub installed back in June 2017, everything was running fine, till we went for a holiday in...
  3. J

    electric oven rcd tripping

    Evening guys. Just bought a second hand full electric oven from a second hand shop and wired it in myself. Im not an electrician but i did it at college for two years and spent two years on site as a mate... The circuit is 32a rcd protected and wired in 6mm twin and earth throughout the...
  4. P

    RCD Tripping on RCD 2 side NOT RCD 1 side

    Hi Folks; Installed a cooker (oven only) in a property on 6mm T+E, tests fine, but RCD keeps tripping out when connected. If I connect on RCD1 side it’s fine but if it is moved to RCD2 side it trips out constantly. Any thoughts are appreciated? Thank you.
  5. Bob Geldoff1234

    Boiler fault and rcd tripping?

    I got called out to house a few days ago with the main rcd tripping when they turned the hot tap on with the combi firing up.They had only just had the new boiler fitted and the tripping had started straight after it was installed. I IR'd the boiler circuit(which was wired on its own 16amp...
  6. M

    Strange RCD tripping problem

    I have a very strange repeated RCD tripping scenario, which appears to suggest that two unrelated circuits are connected. Any problem solving thoughts would be appreciated. I have an electrician who has done several jobs for us (new lighting circuits, appliance installation, outside lights...
  7. captaincaveman

    Kevin please change careers before killing someone

    Hi, If you're a spark, you're reading this, your name is Kevin, you work in the Manchester area and you did a job in Rusholme yesterday on lights that kept tripping the RCD - Please reconsider your career before you do serious damage. It's forgivable that you were unable to diagnose an...
  8. cliffed

    Rcd tripping on downlights

    Been called into a job,electrician who started to find the fault,left & said he couldn’t find the fault,leaving the client running extension leads everywhere for lights,even in the bathroom. Basically for what ever reason the rcbo trips ,it can be reset but trips again. It’s a bungalow with...
  9. C

    RCD tripping a mystery

    Hi I have an issue with random RCD tripping. It happens at different times of the day and no obvious cause (ie particular piece of equipment). All connected equipment has passed recent PAT test and IR on circuit looks ok (>600M PE). A lot of the connected equipment has thermostat controlled...
  10. DC-backfrom the past

    rcd tripping after smoke alarm fitted.

    I was installing a smoke and heat alarm on an existing circuit today (aico ei141 )was already in place, so I have used the same type for the install. All insulation and resistance tests were within limits. I interlinked the alarms and all worked then rcd tripped. Initially we thought it was a...
  11. N

    Main RCD Tripping any ideas?

    Hi everyone. Wondering if anyone has any ideas on this? Last night I got in from work and my board had tripped. Tried resetting main breaker (no good) To cut a long story short I narrowed it down to the ring main (only one ring main for whole house), turned out I had a broken live which...
  12. F

    RCD Tripping Hell with high load

    Hi all. First time poster here with a hell of a lot less hair than I had 3 weeks ago now! so please be nice, I'll try and explain best I can. I am not a sparky but have some idea of electrics. I also own a multimeter. Short version. 100A, 30mA RCD trips INTERMITTENTLY on WYLEX 8 fuse board...
    • Fletch
    • Thread
    • across fault fault finding load rcd rcd tripping tripping
    • Replies: 44
    • Forum: The Welcome Forum
  13. L

    RCD tripping even with all MCB's off when it was a LINE to earth fault.

    Hi, can anyone please explain this situation. 30mA rcd was tripping in a domestic installation. I narrowed it down to a lighting circuit but even with all McB's off, the rcd kept tripping, so I naturally imagined that it mus be a neutral to earth fault. In fact i discovered the problem and it...
    • Lawmal
    • Thread
    • earth fault mcb's off rcd rcd tripping tripping when
    • Replies: 2
    • Forum: The Welcome Forum
  14. D

    RCD Tripping MCB's on Circuit OK

    Hi All I wonder if somebody can help. In our domestic CU one of the RCD's keeps tripping out without any of the MCB's tripping. When I reset the RCD it resets fine without any problems. All is ok for an intermittent period (could be days or hours and it trips again). I think from the forum...
  15. L

    Mains RCD tripping on larger MCB's

    Hello Looking for advise please. Our mains RCD switch 60A 30mA MK LN 5760 is tripping when either one of my larger mcbs is turned on. - 32A shower - 30A sockets - 30A cooker I turned every breaker off and individually turned them on. All three mentioned above individually trip the mains RCD.
  16. weevilward

    Need some ideas - RCD tripping but everything tests fine....

    Hi all, Customer reports sporadic nuisance tripping of RCD. I cannot reproduce it, or fault anything, except SOMETIMES on EFLI test it trips the RCD (megger mft 1553 'no trip' test). I'm out of ideas here, can anyone help? This is what I've got: - TT installation (small domestic); - 30mA RCCB...
  17. D

    ring main mcb & main rcd tripping

    Problem as above - is a disconnected earth wire in a socket sufficient to cause this? If so, I would like a brief explanation of the safety mechanism involved.
  18. leep82

    RCD tripping, problems identifying fault

    I received a phone call from a friend the other night telling me his socket werent working and whenever he tried to reset the MCB the RCD would trip immediately. As i couldn't get to him that night i asked him to unplug anything in the affected sockets and then try to reset the MCB, hoping that...
    • leep82
    • Thread
    • fault identifying other problems rcd rcd tripping reset tripping
    • Replies: 9
    • Forum: UK Electrical Forum
  19. D

    RCD tripping times exam question

    I sat the 2394 written exam tonight and one of the questions was about testing a 30mA RCD. It asked which tests you would carry out and the permitted tripping times. I answered that at 30mA and 150mA it was equal to or less than 300ms and 40ms respectively. Which I believe to be within those...
    • Dave the spark
    • Thread
    • don't exam question rcd rcd tripping tests times tripping tripping times within
    • Replies: 11
    • Forum: UK Electrical Forum
  20. P

    Rcd tripping issue.

    Can someone shed some light on a problem I'm having. I changed a CU today as there were only 6 circuits they are all now rcbo's there was no rcd protection prior to that. On the ground floor circuit the rcd test was x1@ 147ms and x5@ 23ms. However now when the customer turns the heating on its...
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