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Arcing when inserting mains fuse in consumer unit

Discussion in 'Electrics UK' started by ABN, 28 Nov 2018.

  1. ABN

    ABN

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    Just changed a faulty wall socket, when I replace the consumer unit fuse (fuse wire type) with the consumer unit switched on I could hear a small amount of arcing as if drawing current. Everything on that fuse circuit was switched of at the wall.



    Is this normal due to the natural capacitive / inductive load of the wiring or is it likely to point to a more serious problem.
     
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  3. magicmushroom666

    magicmushroom666

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    Probably something else on that circuit that isn't turned off, like a bathroom fan or something else hard wired. Not really anything to worry about.
     
  4. AndyPRK

    AndyPRK

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    I suspect something is still connected on that circuit that you don't realise!
     
  5. flameport

    flameport

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    It's normal if there is a load connected.

    What's not normal or safe is shoving a fuse into the fusebox while it's live.
    If a fault exists on the circuit, the fusewire will vaporise and burn your hand.
    In future, switch off before removing or inserting fuses.
     
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  6. mattylad

    mattylad

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    What he^^ said.
     
  7. ABN

    ABN

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    Thanks for the replies.

    I realise its not good practise to insert fuse while power is on and in future will not do so.

    90% sure nothing was connected but will check again.But if nothing is still conected or hardwired what could becausing the faint arcing noise? Could not see any visible arcing.
     
  8. JohnW2

    JohnW2

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    I think it must be down to that other 10% ! As has been said/implied, if absolutely no current were flowing when you re-inserted the fuse, there would be no such sound - so I suspect that there must have been something connected to that circuit.

    Kind Regards, John
     
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