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Clipsal 30M Light Switch

Discussion in 'Electrics UK' started by Mad_Doctor_X, 6 Jun 2009.

  1. Mad_Doctor_X

    Mad_Doctor_X

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    Hello!

    Looking for a bit of reassurance before I plod on...
    I've got at clipsal 30M two-way light switch in front of me and it has four connections on the back of it. Three of them are labelled 'Common', 'L' and '1' so my thinking is that the L and the 1 are essentially L1 and L2. But the fourth connection has a small piece of breakable plastic blocking access to it and is labelled as either '3', or more probably 'T'. Any ideas as to what the fourth terminal is for would be most welcome!

    Cheers
     
  2. electronicsuk

    electronicsuk

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    An intermediate model of the same switch?
     
  3. Mad_Doctor_X

    Mad_Doctor_X

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    Nah! I've got one of those and that hasn't got any labelling next to the terminals at all!! :eek:
    (It's on a label around the terminal block!)
     
  4. Taylortwocities

    Taylortwocities

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    Send us a pic, but I think that a couple of minutes with a continuity tester should tell you all you need to know :?:
     
  5. Mad_Doctor_X

    Mad_Doctor_X

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    Doh! Thanks for that.
    Continuity testing revealed that 'common', '1' and the plastic covered 'T' are Common, L1 and L2. The terminal marked 'L' is not in continuity with anything regardless of the position of the switch. While fiddling with it I noticed that the terminal is a little thicker than the others (see below).


    [/img]
     
  6. Taylortwocities

    Taylortwocities

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    Ahh.

    L probably then is for "loop". Used to bring a live (or neutral) in and then out again without it being a part of the switch function.
     
  7. DIYnot Local

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