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1 gang, 1 way switch wiring - explanation please

Discussion in 'Electrics UK' started by mtomlin, 12 Jan 2021.

  1. mtomlin

    mtomlin

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    Hello, can someone help me understand what is going on here please with this wiring. Its a 1 gang, 1 way switch - but has more wires than I expected.

    72C64E39-A4A4-4A11-A610-DE2004E8FE9F.jpeg 66BDEEFB-4A0C-40DA-98DF-55A2144FD45C.jpeg
    My explanation is: there is a live in, circuit out (to next switch in following room) and lights out.

    If thats correct, how do I work out which is which? I am assuming COM is live in - so how do I decide the other two in the L1 terminal.

    The reason I ask is that I wish to install a Shelly 1 - and need to know where to wire up Output, Input, Switch, Line input and Neutral on the Shelly.

    Many thanks!
     
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  3. AndyPRK

    AndyPRK

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    Correct.

    The single wire on its own is the out (assuming only one light fitting in room )
     
  4. mtomlin

    mtomlin

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    Thanks for your fast response. Are you saying the one brown live wire into the COM terminal is the output to the lights; and therefore by deduction the two brown live wires in the L1 terminal are the live in and live out. From what I've read i though live is always supposed to come into COM. But if Ive understood you correctly, this wiring is the other way round....which I suppose if the whole house is like it, it doesn't matter?

    And, yes you are correct - just one light fitting (albeit 6 LEDs linked- ie they all come on together).
     
    Last edited: 12 Jan 2021
  5. AndyPRK

    AndyPRK

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    Yes.

    Technically it’s not the normal text book way, but it doesn’t matter
     
  6. mtomlin

    mtomlin

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    Arh, brilliant - that explains a lot - since I've been reading the 'textbooks' and couldn't make head, nor tail of it! Many thanks, appreciate it.
     
  7. RobHJ

    RobHJ

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    mtomlin, I've just moved house and I've got the same wiring issue with my wall lights.
    Any chance you could post a pic of your installed Shelly for reference?
    Cheers
     
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