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Loose neutral

Discussion in 'Electrics UK' started by soloheadbeg, 26 May 2020.

  1. soloheadbeg

    soloheadbeg

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    Hello

    I had 2 wall lanterns one of which never worked since I moved into my house around 16 years ago. I recently replaced both and found the new lantern didn’t work (in the same position as before). I measured voltage between live and earth and got 236V. I’m fairly sure that the neutral must be loose in the inaccessible junction box (in floor space between ground and 1st floor) which feeds both lanterns with separate cables. I junctioned off the working cable (supplying the good lantern) to get the second one working. Before that I snipped the cable to the bad lantern and terminated the three wires safely and enclosed in a water proof junction box. My question is - if the neutral (to the bad lantern) is in fact disconnected at the inaccessible junction box and there is no load between the live and neutral at the end of the cable that used to supply the bad lantern, is this an acceptable situation and is it dangerous.
    Thanks
     
  2. oldbutnotdead

    oldbutnotdead

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    Long as you've terminated the failed leg properly then yes its acceptable and not dangerous. In an ideal world you'd disconnect the other end from the (presumed) inaccessible JB but life sometimes isn't perfect
     
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  4. soloheadbeg

    soloheadbeg

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    Many thanks for the reply. What you’ve said is reassuring. Thanks again.
     
  5. oldbutnotdead

    oldbutnotdead

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    There is always the possibility that the neutral has failed halfway along the cable (due to being gnawed by a squirrel or other rodent or some irriot has put a drill bit through it) and some or all the conductors may be exposed under the floor somewhere. No way of telling without digging the floors out, as long as you're on a modern CU (MCBs etc rather than rewirable fuses) then remember it & next time you change the carpets/flooring dig the JB out and isolate the failed leg
     
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  6. DIYnot Local

    DIYnot Local

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