Expired

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

33
Found 15th Nov 2008
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
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MiscDIY
33 Comments
Put 1 In The Com And 1 In The L1
http://www.hgsc.bcm.tmc.edu/downloads/graphics/Bang.jpgONLY KIDDING COULDENT RESIST,MY WIRING INFO IS GOOD
raptorcigs;3474203

Put 1 In The Com And 1 In The L1



What raptor said:thumbsup:
raptorcigs;3474203

Put 1 In The Com And 1 In The L1



^^^What he said.
raptorcigs;3474203

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!!!!!
bassman_uk;3474225

Does it matter which wire? Thats what I'm holding back on in case I … 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".
http://www.handymanknowhow.co.uk/electrics/testinglive209.jpg
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
octobergirl;3474280

Put the red in C and put the black in C1 or C2 does not make a difference … Put the red in C and put the black in C1 or C2 does not make a difference because it is two wayyou 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?
choc1969;3474275



octobergirl;3474280

Put the red in C and put the black in C1 or C2 does not make a difference … Put the red in C and put the black in C1 or C2 does not make a difference because it is two wayyou 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:
thesaint;3474233

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
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:
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
octobergirl;3474327

two red wires1 is a live all of the timethe other is the switch wire to … two red wires1 is a live all of the timethe other is the switch wire to the lightsocommn is the live all the time oneL1 or L2 (no difference) is your switch wire to the lightyou are supposed to have two red ones as they are both live conductorsbecause one is live continuously and one is only live when you switch the light on



Exactly :thumbsup:
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?
sassie;3474356

for gawds sake people, he has two red wires, does it matter which red … 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;-)
sassie;3474356

for gawds sake people, he has two red wires, does it matter which red … 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.
cheers everyone. Rep will be given out too

I will give it a shot tomorrow (in the light!)
sassie;3474356

for gawds sake people, he has two red wires, does it matter which red … 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:
Shengis;3474372

No.



there ya go op, a simple answer :thumbsup:
sassie;3474356

for gawds sake people, he has two red wires, does it matter which red … 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?



How many people need to tell him what to do?
thesaint;3474384

How many people need to tell him what to do?



For someone scared about the consequences of Electricity, simplicity was the key :thumbsup:
thesaint;3474384

How many people need to tell him what to do?



then i must be as stupid as the op because i couldnt see his question answered, he was asking did it make a difference which red went inot which hole, adn just kept being told to put one into one hole ad the other into other hole, not whether it mattered which one, at a guess i would say 1st time changinf a light switch and was nervous
bassman_uk;3474399

For someone scared about the consequences of Electricity, simplicity was … For someone scared about the consequences of Electricity, simplicity was the key :thumbsup:



raptorcigs;3474203

Put 1 In The Com And 1 In The L1



fox2020;3474220

What raptor said:thumbsup:



thesaint;3474222

^^^What he said.



thesaint;3474233

Simple instruction, put 1 in "Com" and 1 in "L1".

sassie;3474410

then i must be as stupid as the op because i couldnt see his question … then i must be as stupid as the op because i couldnt see his question answered, he was asking did it make a difference which red went inot which hole, adn just kept being told to put one into one hole ad the other into other hole, not whether it mattered which one, at a guess i would say 1st time changinf a light switch and was nervous



Is first time, and not about to want my life expired!

we have to learn how to do things, and if anyone else asks, I can tell them the right answer too.

Don't like the reference to being stupid though :x
bassman_uk;3474399

For someone scared about the consequences of Electricity, simplicity was … For someone scared about the consequences of Electricity, simplicity was the key :thumbsup:



hope your now sorted ;-)
sassie;3474427

hope your now sorted ;-)



I shall try in the morning when i don't have to work from Torchlight
How many HUKDers does it take to change a lightswitch?





Just one, the rest just give them instructions from a safe distance:whistling:
harlzter;3474524

How many HUKDers does it take to change a lightswitch?Just one, the rest … How many HUKDers does it take to change a lightswitch?Just one, the rest just give them instructions from a safe distance:whistling:



http://img527.imageshack.us/img527/2235/electriclr6.gif
bassman_uk;3474424

Is first time, and not about to want my life expired!we have to learn how … Is first time, and not about to want my life expired!we have to learn how to do things, and if anyone else asks, I can tell them the right answer too.Don't like the reference to being stupid though :x



Some people do find it makes them feel better to belittle others on this forum, not too sure why, however you'll find most posters helpful:thumbsup:
Should the new question be 'How many people will it take to switch on a lightbulb?' :roll:
The above has been very helpful, thank you.
Now what would you do if you have a double switch with four red wires and another tiny red wire bridging diagnallly across?
Please help

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