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light switch

Discussion in 'Electrics UK' started by low drains drifter, 6 Jun 2021.

  1. SUNRAY

    SUNRAY

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    I thought someone did, otherwise I would have done.

    That's what I took this to mean
     
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  3. opps

    opps

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    That is a valid question. On each occasion I was standing on the ground (ie earthed rather than on a rubber mat), on some of those occasions I did double check by using a multimeter.
     
  4. plugwash

    plugwash

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    Ultimately no tool is infallible, every tool has it's pros and cons. Electricians in the UK seem to put all their faith in "two pole testers", but a "two pole tester" won't tell you if *everything* is live including the earth terminal and the bloody box! A neon screwdriver will.
     
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  5. JohnW2

    JohnW2

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    "A neon screwdriver may". As you say, no tool is infallible, and that includes neon screwdrivers.

    If "everything" in the house is live, then it's quite likely that the capacitive coupling from the user's body to 'live things' will be greater than any capacitive coupling to true earth - in which case the neon screwdriver wouldn't indicate "live" any more than a 'two-pole tester' would.

    Kind Regards, John
     
  6. low drains drifter

    low drains drifter

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    how did you know I was wasting my time faffing about with a neon screwdriver !! lol
     
  7. Taylortwocities

    Taylortwocities

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    Maybe you don’t realise this; but for an electrical item to work (such as a mains lamp) it needs two things a live supply, nominally 240volts, and a neutral.
    Your neon screwdriver or magic wand device can help you with determining if there is a voltage, but it’s as useful as an ashtray on a motorcycle in checking that the neutral is in place and actually is at zero volts.
    the neutral is half of the supply for a circuit and provides half of the problems when things don’t work.
    A two probe voltage test device is what is needed.
     
  8. low drains drifter

    low drains drifter

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    Firstly, apologies if I have not replied to each individual thread. Can I start again? here's the back of the light switch. WhatsApp Image 2021-06-09 at 13.25.29.jpeg
     
  9. BS3036

    BS3036

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    It was the way you expressed yourself. If you'd been using a 2-pole meter of some sort you would have described what you found in more accurate detail. :)
     
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  11. low drains drifter

    low drains drifter

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    this is the light switch we replaced WhatsApp Image 2021-06-09 at 15.07.41.jpeg
     
  12. BS3036

    BS3036

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    As EFLI already suggested, have you tried putting both switch wires into the same terminal?
     
  13. Taylortwocities

    Taylortwocities

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    But NOT the one with the blue wire in it!:eek:
     
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  14. low drains drifter

    low drains drifter

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    been down to my property. putting both wires in to the same terminal doesn't put the light on. all 3 red wires in the rose carry electricity.

    WhatsApp Image 2021-06-09 at 13.25.41.jpeg
     
  15. sparkwright

    sparkwright

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    Are you certain all the wires at the ceiling rose are securely terminated?

    Have you checked the actual lampholder? Are the connections ok?

    Does the lampholder pins make contact with bulb?
     
  16. low drains drifter

    low drains drifter

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    heading back today and we'll check these pouints
     
  17. Taylortwocities

    Taylortwocities

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    Two probe voltage test device you need.
     
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