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Burnt out cooker switch

Discussion in 'Electrics UK' started by Adam78, 4 Dec 2019 at 5:02 AM.

  1. Adam78

    Adam78

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    Hi, I have neff electric oven and last night there was loud bang and when i went into the kitchen the red cooker switch with socket plug was all burnt out round edges.

    Any ideas what could have caused it?

    Is it going to require a new switch?

    Any help appreciated.
     

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    Last edited: 4 Dec 2019 at 6:26 AM
  2. chivers67

    chivers67

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    A loose wire inside it no doubt, maybe an earth or neutral
     
  3. Nozzle

    Nozzle

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    A loose terminal, leading to heating, leading to melted insulation leading to the eventual pop as it shorted out.

    Nozzle
     
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  4. bernardgreen

    bernardgreen

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    equally possible to be Live

    And Yes a new switch would be advisable.

    The explosion could have coated the switch with conductive "debris".. Carbon from burnt insulation and/or vaporised copper from the arcing that caused the explosion
     
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  5. JohnD

    JohnD

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    Those large, stranded cables need to have the terminal clamps re-tightened a week or so after fitting, because the soft copper deforms under pressure.

    Hardly anybody does it.

    It's surprising how un-tight they can be.
     
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  6. Londoner2

    Londoner2

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    This happened to me once.

    Just replaced it, had to cut back the cables a bit, never knew why it happened.
     
  7. johnny2007

    johnny2007

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    Shouldn't the rcb trip?
     
  8. chivers67

    chivers67

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    Probably did!
     
  9. johnny2007

    johnny2007

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    I mean, before it bangs.
    Not an electrician, just curious.
     
  10. JohnD

    JohnD

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  11. johnny2007

    johnny2007

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    Thanks, this explains it in details :LOL:
     
  12. JohnD

    JohnD

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    An RCD will trip when there is a leakage of current to earth.

    An overheating connection that burns out is not leaking to earth.
     
  13. wundaboy

    wundaboy

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    Given the loud bang and blast marks around it, I'd wager that's on a BS3036 rather than a breaker of any kind.
     
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  14. bernardgreen

    bernardgreen

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    Information for the OP.

    A BS3036 is a fuse like this

    upload_2019-12-4_16-39-50.jpeg
     
  15. Harry Bloomfield

    Harry Bloomfield

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    It could also be water running down those tiles, from cooking condensation which has shorted the terminals. Its a fair blast, it will certainly need the switch to be replaced, as an absolute minimum and perhaps some repair of the cables if they are damaged.
     
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