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Light switch, just two red wires

Discussion in 'Electrics UK' started by donijil, 30 Sep 2021.

  1. donijil

    donijil

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    Attempting to replace an old light switch I was surprised to find it's wired up with just two red wires. For what it's worth I've labelled the wires as they were positioned in the old switch (L1 and L2).

    I've no idea how to proceed with this. The switch I'd intended to put in has a L1 and a COM.

    I have sealed the ends with choc blocks and sealed over the hole so no-one can come into contact with it. In the meantime I've no lighting in the kitchen. I can't put the old switch back on because it's shot at.

    Would really appreciate help with how to resolve this.
     
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  3. BS3036

    BS3036

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    All a switch does is to join two wires together. If there are two contacts labeled L1 and COM then just connect one wire to L1 and the other to COM.
     
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  4. CBW

    CBW

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  5. bernardgreen

    bernardgreen

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    There are two ways the terminals can be labelled


    upload_2021-9-30_14-12-31.png
     

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  7. donijil

    donijil

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    Thank you all very much. Job done. I'm grateful you gave me the confidence to tackle this.
     
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  8. 333rocky333

    333rocky333

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    Is the switch Metal
     
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  9. donijil

    donijil

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    Hi, no, it's plastic.

    If metal it could become live I presume?
     
  10. DIYWell

    DIYWell

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    If the switch had been metal,
    Sort of. The risk is that a metal faced switch develops a fault e.g the screw just nicks the live wire, and makes the face live too. First thing you know about it is the RCD tripping. If it had been a metal switch, it would have needed an earth wire connected to it to keep you safe.

    You've done the job, you've got working lights, well done. Just something to bear in mind if you swap out another switch in the future.
     
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