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Bathroom cabinet switching

Discussion in 'Electrics UK' started by Observer, 22 Dec 2016.

  1. Observer

    Observer

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    I've just had a bathroom mirror unit installed in a new bathroom. It has SELV lights downlights for the mirror (set in the top shelf) and under the bottom shelf. On inspecting the wiring arrangement, set in a recess in the top of the unit, I noticed that the 230v supply to the transformer has a permanent live and switched neutral. The switch is a small rocker switch in the underside of the top shelf. Is the switching arrangement (switched neutral) normal?

    [Edit]
    To clarify, there is a choc block connector in the wiring recess to take mains supply in and switched feed out to the transformer. If it is wired in accordance with the labelling, the SELV transformer will have a permanent live feed and a switched neutral.
     
    Last edited: 22 Dec 2016
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  3. ban-all-sheds

    ban-all-sheds

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    The neutral should not be switched. The Wiring Regulations forbid single-pole switching of neutrals because of the danger of something appearing to be off but still being live. The Wiring Regs don't apply to appliances, but I'd advise against wiring it as per the instructions for the same reasons - swap the connections so that it's the live which is switched.
     
  4. deadshort

    deadshort

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    Good to hear you're back BAS(y)…… it's been boring without your input.

    DS
     
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  5. EFLImpudence

    EFLImpudence

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    Likewise.
     
  6. ban-all-sheds

    ban-all-sheds

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    Well - I returned to follow up on what was/might have been a stated desire by Winston to resolve our problem. While I was here anyway, I joined in, but it remains to be seen if he does want to sort things out - if not I can't stay.
     
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  7. mikeyd

    mikeyd

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    Observer: Can you please elaborate, You obviously understand the difference between SELV and LV. You also think LV is 230V? Hmm, can't help thinking....

    MODS: Delete this if you want to. Is the OP for real? If BAS has replied I'm inclined to think that OP is is a pseudonym.
    Then again, I've been wrong before. :)
     
  8. Observer

    Observer

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    Well I hope I am 'for real'. I'm not a qualified sparky but I do have some knowledge. More importantly, I think, I recognise the limits of my knowledge.

    I didn't state that all LV supplies are 230V, so not sure why you're making a point of questioning my understanding of that.

    I had a genuine question that I wasn't sure about. BAS confirmed what I thought ought to be correct, but I didn't want to presume my knowledge is complete, so asked a question of people who I accept know more than me.
     
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  9. DIYnot Local

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