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extractor fan - wiring question

Discussion in 'Electrics UK' started by diylady, 10 Jul 2021.

  1. diylady

    diylady

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    Hi all

    I’m after some advice please. My downstairs toilet fan needs replacing and tonight i whipped off the cover ( power off of course) to find the attached wiring - see picture . My surprise is that the red live is not connected to anything. Is this normal? Also the loop between the T And L? The set up of the fan is that it is switched on by the light switch. No isolation switch anywhere . The fan i believe has been in place since the property was built in 1995. Just out of interest . The T - is switched live right? Is this because of a timer ( i didn’t know it had one as it has never worked. Have only been in the property a couple of years) or because power is coming from the light.
     

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  3. EFLImpudence

    EFLImpudence

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    Yes the T is for Timer.

    It would appear that whoever did it, did not want the timer run-on feature - just off/on with the light.
    That is how that would be done.

    Presumably the red is permanent live. Check and if it is put it in L and remove the link wire - or do that with your new fan.
     
  4. winston1

    winston1

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    There does not seem to be an earth wire. You should really replace the whole cable.
     
  5. 333rocky333

    333rocky333

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    Do you really think cable installed in 1995 would have no earth, at the worst case it may need connecting at the supply end
     
  6. Taylortwocities

    Taylortwocities

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    Look at the picture Whinny, there is an earth conductor, but it has been cut off at the cable end. (Hint, it’s that copper-coloured thing inside the bend of the red wire).
    @diylady you do not need a new cable - assuming your new fan does not need an earth connection (it won’t) and that the earth conductor is actually connected to earth at the power source end. That will provide the necessary cpc for the cable.
     
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  8. winston1

    winston1

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    No, but possibly it was not 1995.
     
  9. winston1

    winston1

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    I've looked again but still can't see it. Must be my eyes after all these years.
     
  10. Taylortwocities

    Taylortwocities

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    11DF8E5D-87B1-484D-AE64-B0FD4A57B866.jpeg
    just there. In any case I’ve never seen RYB cable like that that did not have an earth. Have you?
     
  11. winston1

    winston1

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    Maybe not. But I have seen red, white, blue without an earth. Showing my maturity!
     
  12. Taylortwocities

    Taylortwocities

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    So your warning post to @diylady was wrong then? Thank you for acknowledging that.
     
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