Diagnosing a tripping RCD to septic tank
Register
Results 1 to 2 of 2
  1. #1
    Newbie
    Join Date
    Nov 2008
    Posts
    4
    Thanks
    0
    Thanked 0 Times in 0 Posts
    Downloads
    14
    Uploads
    0

    Default Diagnosing a tripping RCD to septic tank

    Hi all,

    Quick question for the sparkies I have a bio tank pump that had been working fine up until today, it tripped the main rcd out. If i isolate the bio tank as it has its own radial I can reset the RCD. I disconnected the pump and still the same I disconnected the industrial connector and had the bare wires separated and it still trips when the MCB flipped so it must be the wiring it travels the length of my house down the wall and about 10 metres underground, it's normal plastic cable that doesn't appear to be in armoured conduit but anyway are their any easy ways to to test this? I'm thinking I'm gonna have to cut the wire at various points (before it goes underground) and see if that helps and then rerun the the remaining wire. Interesting when it first tripped I had the socket apart at the pump noticed the earth wasn't connected (deliberate?) Connected it up put back together and it was ok for a few hours. Now it trips even without the pump or connectors attached, I was trying to rule out water ingress so freed wire at pump end.

    I have continuity between neutral and earth I guess that's expected and not a n/e fault as I can reset the RCD if the MCB is isolated. I guess I need an I/r tester to do any real testing? No measurable continuity between l/e...

    Sent from my CLT-L09 using Tapatalk

  2. #2
    Top Poster

    Join Date
    Jul 2019
    Posts
    136
    Thanks
    30
    Thanked 17 Times in 8 Posts
    Downloads
    2
    Uploads
    0

    Default

    There shouldn't be continuity between earth and neutral. This will cause tripping

 

 

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •