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Adding second gang to loop-at-switch for under cabinet lighting

Discussion in 'Electrics UK' started by Obious, 27 Apr 2021.

  1. Obious

    Obious

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    Hi All,

    Long time lurker, first time poster!

    I have 4 ceiling downlights in my office (controlled via a single switch on the wall) and under cabinet LED lighting (3x LEDBRITE T5 LED; 8w, 240v) that are each plugged into the mains via three-pin plugs.

    I’m trying to do away with powering the LED strips/tubes via the plug and instead via the ring in the ceiling which would then allow me to add another switch at the wall (two gang, two way) to control the under cabinet lights (my aim is to do this so that I don’t have to go around and turn on all LED strips manually; I currently have three and wish to be able to turn them all on with a single switch).

    After taking the switch off the wall, the wiring is identical to the attached image and I’m wondering if its a simple as just adding an additional twin-core & earth cable into the switch and bridging the existing COM to the new COM switch, connecting the new LIVE cable to the new L1 switch as well as connecting both the neutral and earth from the new cable to the existing connections.

    Hopefully that makes sense (I’ve attached an image of the light switch and the twin+earth I’ve managed to feed through the ceiling and wall cavity) 622F83B2-14A9-4E7F-8A61-CB76DC1EA92A.jpeg
    3F657965-C0DD-4D8E-98CB-F8742E6856CD.png

    Any help would be appreciated

    Thanks
     
  2. flameport

    flameport

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    Yes, although the 'com' on the existing switch is actually the lower one with 2 wires in, not the terminal that's marked 'com' with a single wire.
     
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  4. SUNRAY

    SUNRAY

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    I imagine you are correct however my immediate thought: I wonder if that's loop in/out or 2 separate switched cables?
     
  5. Obious

    Obious

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    I believe its loop in/out as I’ve tested both red/live cables that feed into the single L1 port with a voltage detector (with the light switch in the ‘off’ position) and I’m getting a positive reading/hit. @flameport I think you’re right, for some reason the connections on this switch are backwards but I’ll correct when I rewire
     
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