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Tripping RCD

  • 14-12-2020 11:10PM
    #1
    maxamillius
    Registered Users, Registered Users 2 Posts: 1,141 ✭✭✭


    Had a quick look at my neighbours house this evening but I have no test gear etc so difficult to diagnose fault.

    Think I narrowed it down to heating circuit, I disconnected a hub heating thermostat from the fused spur and was able to reset the breaker and RCD.

    Is it possible that these controllers develop a fault that will trip it out?

    He currently know has no heating.

    Cheers


Comments

  • #2
    Lenar3556
    Registered Users, Registered Users 2 Posts: 2,112 ✭✭✭Lenar3556


    Tripping RCD would indicate leakage to earth. A digital thermostat itself would typically be an unlikely contender - but you mention a hub version, so it possibly has an earth connection? If it didn’t have an earth connection, as most stats don’t, it in itself could really be discounted as a cause.

    Possibly when removing the stat, you disconnected equipment downstream such as pumps/valves/boiler? These would be higher risk candidates for earth leakage.


  • #3
    maxamillius
    Registered Users, Registered Users 2 Posts: 1,141 ✭✭✭maxamillius


    Lenar3556 wrote: »
    Tripping RCD would indicate leakage to earth. A digital thermostat itself would typically be an unlikely contender - but you mention a hub version, so it possibly has an earth connection? If it didn’t have an earth connection, as most stats don’t, it in itself could really be discounted as a cause.

    Possibly when removing the stat, you disconnected equipment downstream such as pumps/valves/boiler? These would be higher risk candidates for earth leakage.

    I removed the pump and boiler from the circuit so counting them out. It’s only when I connected the hub back in it trips straight away. Found it strange myself that this would cause the issue?!


  • #4
    Wearb
    Moderators, Home & Garden Moderators Posts: 6,574 Mod ✭✭✭✭Wearb


    Biggest culprit that I find for such heating problems is the circulating pump.


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