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Changing a light switch - what if I re wire it wrong?

FearTheBassPlayerFearTheBassPlayer

I've got a faulty dimmer switch which needs replacing, and I'm replacing it with a standard switch.
All went fine until I took the switch off!!
There are 2 red wires, and there should be 1 red and 1 black.
There are no markings on the back of the dimmer switch, and on the back of the new switch I've got 3 points -COM , L1 and L2.
Logic would say that the 2 wires should go in COM and L1 or L2, but the problem is both wires are the same colour, and there aren't any COM or L markings on the back of the old switch.
I'm worried about wiring it wrong and messing up the electrics in he house. This is such a simple job, but made harder by the fact I don't know what wire is what.
Any sparkies out there? Can you tell me if I wire it up wrong, will it blow the electrics up, or me up, or just simply not work?

Cheers in advance

All Comments (33)

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1
    raptorcigs
    Put 1 In The Com And 1 In The L1
    choc1969
    raptorcigs
    http://www.hgsc.bcm.tmc.edu/downloads/graphics/Bang.jpgONLY KIDDING COULDENT RESIST,MY WIRING INFO IS GOOD
    fox2020
    raptorcigs
    Put 1 In The Com And 1 In The L1


    What raptor said:thumbsup:
    thesaint
    raptorcigs
    Put 1 In The Com And 1 In The L1


    ^^^What he said.
    FearTheBassPlayer
    raptorcigs
    Put 1 In The Com And 1 In The L1


    Does it matter which wire? Thats what I'm holding back on in case I haven't got them right, because of me not knowing which is which.

    Damn 2 red wires!!!!!
    thesaint
    bassman_uk
    Does it matter which wire? Thats what I'm holding back on in case I haven't got them right, because of me not knowing which is which.


    Simple instruction, put 1 in "Com" and 1 in "L1".
    choc1969
    octobergirl
    Put the red in C and put the black in L1 or L2 does not make a difference because it is two way
    you can use L1 or LC2 for the black as L1 and L2 are really just for one or two way ue and an ordinary switch is one way do does not matter which you put it in
    thesaint
    octobergirl
    Put the red in C and put the black in C1 or C2 does not make a difference because it is two way
    you can use C1 or C2 for the black as C1 and C2 are really just for one or two way ue and an ordinary switch is one way do does not matter which you put it in


    Have you read the opening post?
    FearTheBassPlayer
    choc1969
    http://www.handymanknowhow.co.uk/electrics/testinglive209.jpg


    octobergirl
    Put the red in C and put the black in C1 or C2 does not make a difference because it is two way
    you can use C1 or C2 for the black as C1 and C2 are really just for one or two way ue and an ordinary switch is one way do does not matter which you put it in


    problem is I have 2 red wires, and no multimeter:w00t:
    FearTheBassPlayer
    thesaint
    Simple instruction, put 1 in "Com" and 1 in "L1".


    So can you tell me the difference between the 2 red wires? They surely can't do the same thing
    choc1969
    bassman_uk;3474299
    problem is I have 2 red wires, and no multimeter:w00t:


    doesn't matter.......one red in Com, one in L1 :thumbsup:

    everyone should have a multimeter in their toolbox.....tut tut :whistling:
    octobergirl
    two red wires
    1 is a live all of the time
    the other is the switch wire to the light
    so
    commn is the live all the time one
    L1 or L2 (no difference) is your switch wire to the light
    you are supposed to have two red ones as they are both live conductors
    because one is live continuously and one is only live when you switch the light on
    choc1969
    octobergirl;3474327
    two red wires
    1 is a live all of the time
    the other is the switch wire to the light
    so
    commn is the live all the time one
    L1 or L2 (no difference) is your switch wire to the light
    you are supposed to have two red ones as they are both live conductors
    because one is live continuously and one is only live when you switch the light on


    Exactly :thumbsup:
    sassie
    for gawds sake people, he has two red wires, does it matter which red wire goes into which hole, that is what he is asking?
    fox2020
    sassie
    for gawds sake people, he has two red wires, does it matter which red wire goes into which hole, that is what he is asking?


    Don't worry sassie it's sorted;-)
    Shengis
    sassie
    for gawds sake people, he has two red wires, does it matter which red wire goes into which hole, that is what he is asking?


    No.
    FearTheBassPlayer
    cheers everyone. Rep will be given out too :)

    I will give it a shot tomorrow (in the light!)
    choc1969
    sassie;3474356
    for gawds sake people, he has two red wires, does it matter which red wire goes into which hole, that is what he is asking?


    sass. we have told him that, even game him a pic :whistling:

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