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    Non protected MCB tripping RCCB !! How?

    Thanks ColJack that gives me a good way forward and I fully understand that. Might be a few days though cos have to go away to work till Monday. I will update as soon as I get a chance next week. Cheers.
  2. S

    Non protected MCB tripping RCCB !! How?

    Ahh I see, I think! Great info. I think I need some specialist sparky test gear really. Thanks for the help. Cheers
  3. S

    Non protected MCB tripping RCCB !! How?

    I have checked all the other neutrals and they are correctly wired. This circuit seems to run some sockets but it is not a ring. In desperation I have contaced the previous owners of this house and managed to get some history. Here is the story. The MCB that trips the RCCB was on the...
  4. S

    Non protected MCB tripping RCCB !! How?

    OK here goes. I have a split consumer unit that is wired normally. One of the MCBs on the non protected side (I have checked that the neutral is on the non protected neutral block) trips the RCCB when ever the MCB is reset. The MCB does not trip itself, it just trips the RCCB! So I am unable to...
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