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Main Switchboard buzz sound

  • 21-02-2008 10:23am
    #1
    PeteJones
    Closed Accounts Posts: 35 ✭


    Recently this buzz sound in the main switchboard started and I believe it is in the one where the washing machine is connected to. Not sure if anything else is connected to it but the other night the sound was so loud that it switched off. I switched it back on and is fine but still buzz noise. It's a 20A, can it be replaced with a 25A or 30A?

    Thanks
    Pete


Comments

  • #2
    Stoner
    Registered Users, Registered Users 2 Posts: 10,952 ✭✭✭✭Stoner


    PeteJones wrote: »
    Recently this buzz sound in the main switchboard started and I believe it is in the one where the washing machine is connected to. Not sure if anything else is connected to it but the other night the sound was so loud that it switched off. I switched it back on and is fine but still buzz noise. It's a 20A, can it be replaced with a 25A or 30A?

    Thanks
    Pete

    In short no, if it is wired in a radial circuit a 25 Amp MCB would not be recommended, it is too much for the cable to handle

    It could be as simple as replacing the MCB or checking the terminations at the boards (both electricians jobs)
    A dodgy connection or MCB can cause this.
    Have you too much on the one circuit? is something else looped off the MCB at the board ?

    Some investigation from a sparks would address this , but you'd have to be there and fuse boards/ consumer units are too dangerous for a DIY walk through sorry.:( + one look at the board would cut out a lot of typing

    However, it should be easy to address.


  • #3
    Copper
    Registered Users, Registered Users 2 Posts: 68 ✭✭Copper


    Is it a Garo RCD (trip switch) you have by any chance?


  • #4
    gazelec
    Registered Users, Registered Users 2 Posts: 85 ✭✭gazelec


    Is this only happening at night time by any chance?


  • #5
    gamer
    Closed Accounts Posts: 2,227 ✭✭✭gamer


    IS it an old round type fuse ,or modern trip switch/fuse fusebox consumer unit.


  • #6
    Sparky
    Registered Users, Registered Users 2 Posts: 22,231 ✭✭✭✭Sparky


    If its only happening at night time and you may have storage heating its your storage heating contactor making the buzz noise.

    That said, even if its not that. It can be many things like a loose connection, internals of the MCB degrading etc.
    Get a sparks out to check it, as its not something you should attempt to resolve by yourself. :)


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  • #7
    gazelec
    Registered Users, Registered Users 2 Posts: 85 ✭✭gazelec


    Exactly,it sounds like a storage heater contactor on its way out (if you have got storage heating),if it is the contactor that is buzzing it does need to be replaced but as a short term solution you could try tapping this with a screw driver end or else turn the breaker off feeding this and turning it back on again,normally the buzzing stops but this is only a short term fix and a replacement is needed for those silent nights :D


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