1. Visiting from the US? Why not try DIYnot.US instead? Click here to continue to DIYnot.US.
    Dismiss Notice

Wiring help, bathroom light and fan (1)

Discussion in 'Electrics UK' started by brotchaq, 25 Jan 2021.

  1. brotchaq

    brotchaq

    Joined:
    12 Sep 2012
    Messages:
    4
    Thanks Received:
    0
    Country:
    United Kingdom
    Hello all
    Long time reader, first time in a while poster.

    I am looking to add some smart elements to my domestic lighting. First task is to understand how things are wired. I have posted an image showing the wiring in loft and at switch and am hoping that I could get confirmation of my assumptions.

    I think that:
    loft wire 1 - switch wire c
    loft wire 2 - switch wire a, b or indeed neither
    loft wire 3 - switch wire d

    Thoughts?
    Thanks in advance

    B304216C-2474-4FB6-8D49-09B77ACBBA6F.jpeg
     
  2. brotchaq

    brotchaq

    Joined:
    12 Sep 2012
    Messages:
    4
    Thanks Received:
    0
    Country:
    United Kingdom
    All

    Another question if I may.

    In the attached image, can someone explain why the V variable output terminal of the Danlers dimmer is connected to the adjoining fan switch common, rather than the L terminal on the dimmer switch?
    Is this OK?

    Thanks in advance

    image.jpg
     
  3. Sponsored Links
  4. EFLImpudence

    EFLImpudence

    Joined:
    7 Jul 2010
    Messages:
    37,115
    Thanks Received:
    4,168
    Location:
    Retired to:
    Country:
    Portugal
    It doesn't matter; it is alternating current.
    Not sure if it makes a difference with two-way switching.
    Swap the wires if you want to.

    Yes, that also doesn't matter - for one way switches.
    All a switch does is connect the two wires together.
     
    • Thanks Thanks x 1
  5. EFLImpudence

    EFLImpudence

    Joined:
    7 Jul 2010
    Messages:
    37,115
    Thanks Received:
    4,168
    Location:
    Retired to:
    Country:
    Portugal
    Yes,

    As you say, although neither a nor b is actually necessary for operating the switches, so

    I would think a or b is a supply and b or a supplies something else; can't tell which is which.
     
    • Thanks Thanks x 1
  6. Sponsored Links
  7. SUNRAY

    SUNRAY

    Joined:
    28 Jul 2009
    Messages:
    5,288
    Thanks Received:
    393
    Location:
    Kent
    Country:
    United Kingdom
    The whole thing is a bit unusual, I'm guessing the fan may have been a later addition.
     
  8. DIYnot Local

    DIYnot Local

    Joined:
    3 Sep 2019
    Country:
    United Kingdom

    If you need to find a tradesperson to get your job done, please try our local search below, or if you are doing it yourself you can find suppliers local to you.

    Select the supplier or trade you require, enter your location to begin your search.


    Are you a trade or supplier? You can create your listing free at DIYnot Local

     
Loading...

Share This Page