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Shower switch burnt out

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    #32
    2011
    Moderators, Home & Garden Moderators, Technology & Internet Moderators, Regional East Moderators Posts: 12,595 Mod ✭✭✭✭2011


    Steve wrote: »
    That would worry me.

    It would suggest it's not a mechanical failure but a poor connection.

    I have seen this quite a few times.
    When there is a high resistance on a cable with a large current flowing through it the heat can travel up the cable and cause the insulation to melt and blacken on the cable like this.


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    #33
    Steve
    Moderators, Category Moderators, Entertainment Moderators, Sports Moderators Posts: 22,584 CMod ✭✭✭✭Steve


    2011 wrote: »
    I have seen this quite a few times.
    When there is a high resistance on a cable with a large current flowing through it the heat can travel up the cable and cause the insulation to melt and blacken on the cable like this.

    I've seen commercial switchrooms burn down because of issues like this, improperly tightened connects are lethal.

    In the one I saw, it was due to builders using a kango a few feet away digging a trench, the board wasn't checked after the works were completed and a 250A S/F went up.

    That's why I'd be worried and if it was my house, I's be going around checking all nearby connections. :)


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