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Two red wires..

Discussion in 'Electrics UK' started by pp7822, 29 Sep 2020.

  1. pp7822

    pp7822

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    Hi all, I wonder if you can help? I was about to change an old white plastic dimmer switch for a 1 gang polished steel face plate. Recently moved to a new property and met by what appears to be fairly antiquated electrics! Opened the faceplate fo be met by two red wires. One has a piece of brown insulating tape wrapped around it. There is no earth wire that I can see. Obviously I haven’t fitted the new plate. Can I have some advice on what setup I have here, what my options are and whether or not I can fit my new polished faceplate or not? Thanks in advance.
     

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  3. flameport

    flameport

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    One wire is permanent line, the other switched.
    Doesn't matter which way they are connected to the 2 terminals on the switch.

    Metal switches cannot be used.
     
  4. pp7822

    pp7822

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    Thank you for the quick response. I appreciate your help. I suspected I couldn’t use the metal switch. How old do you think this wiring is? To have the house upgraded to newer electrical wiring, how much do you think that would cost fitted? Would really like to have more modern electrical sockets ect.
     
  5. flameport

    flameport

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    If there is no earth on the lighting circuits, it's well over 50 years old.
     
  6. endecotp

    endecotp

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    Are the wires in a metal conduit? In your picture we can’t see any of the outer grey (or white) sheath of a cable.
     
  7. AndyPRK

    AndyPRK

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    I was wondering about it being conduit.
    However the screw holes are nylon, so it’s unlikely to be earthed.

    And in fact the box is too shallow for round conduit
     
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  9. Harry Bloomfield

    Harry Bloomfield

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    I would agree with that, based the style of the back-box.
     
  10. sparkwright

    sparkwright

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    They used to connect narrow imperial conduit to shallow boxes with an adaptor thingy.
     
  11. Harry Bloomfield

    Harry Bloomfield

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    Oval profile, with an open seam, and clamped into the adaptor thingy you mentioned.
     
  12. pp7822

    pp7822

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    Thank guys. I’m resigned to the fact that as there is no earth I’m stuck with plastic for now. Many thanks for advice.
     
  13. endecotp

    endecotp

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    IS IT CONDUIT ?
     
  14. RF Lighting

    RF Lighting

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    NO
     
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