I have 2 way swiches in hall .I would like to install 1 dimmer and leave the other switch as is ....Trouble is on the original wiring in switch .. all red colours with 2 into com .. 1 into L2 and 1 into L3 .... i have a 2 way dimmer with only L1 and L2 connections .Can any one help .
Rotary on/off dimmers are only suitable for 1-way circuits. If you have a 2-way circuit, You must install a push-on/push-off dimmer and replace one of the switches with that dimmer. You can only use one push-on/push-off dimmer in a 2-way circuit. It must be used with a normal switch as your second switch. When you switch on a push-on/off dimmer the lights will come on at the same level they were at before they were last switched off. Push-on/off dimmers can also be used in 1-way circuits.
Hope this is of help
the dimmers are touch dimmers one touch for on and hold etc to brighten or dim ........What i really want to do is get rid of the 2 way circuit . just blanking one off and just using 1 dimmer .. so of the 4 wires in the original switch i need to know which ones i can use for a 1 way dimmer .The other surplus wires will be insulated in dimmer .. The other switch will be blanked and wires again insulated .
Sorry you have lost me now with the dimmer connections , draw out Two triangles as you say, and draw wires connected as i tried to explain.
May help to work out what you have when you see it
Your description of the dimmer, i cannot see how it can work with no other connections , if two gang it would need Two dimmed outputs as well as the supply cable or cables
Are you sure theres not L1 and L2 for Each gang
And could the L1 and L2 be in and out rather than L and N
If it says you need a neutral it is unlikely there is a NEUTRAL AT YOUR SWITCH so you may not be able to fit it.
If your dimmer was one gang and only had L in And L out connections
then yes you would be right to connect how you say,but you still would need to do something at the other two way switch, as the dimmer and light would only work with that switch in one position.
Unless you fit a 2 way dimmer and keep the 2 way wiring
If you remove the L3 wire from the existing switch now you will see what i mean,the two way wont work, this will simulate where the dimmer will be connected.
As said before check with old switch using common and L2 terminal that you have done it right first before blowing up the dimmer
Can you post the make and model of the switch you are trying to fit. Rocky's description is perfect and easy to follow but you seem to be having trouble grasping this. There is no neutral connection and i doubt if you have a neutral at your switch. Re-read Rocky's post carefully and if you still can not understand it then I suggest you get an electrician.
IF NO try this simpler way
OBVIOUSLY TURN POWER OFF WHEN CONNECTING
REINSTATE ONLY FOR TESTING
Leave the SWITCH ON FOR NOW the one with 4 wires in ( call switch A ) and remove L3 wire from switch A and seal off.
We assume this is where the dimmer is to go.
We assume you now dont want the two way or other switch no more, your post 1 and post 2 appear to conflict.
We assume there is other connections on the dimmer even though there is because only L1 AND L2 you want to use as 1gang and leave other gang 2 unused.
We assume there is 1 wire in each terminal of the other switch as this is essential if it was two way originally.
We assume L2 is now not neutral as stated in post 3
you now have same connections as where the dimmer will go LATER.
2 wires old (switch A) common, will go to dimmer L1
1 wire old (switch A) L2, will go to dimmer L2
Now try the switch the light will only work sometimes depending on other switch position (call switch B)
THIS IS because the old L1 and L2 only link between switches
There is no wire from switch A to the light!
The common from switch B actually goes to the light.
TOTALLY Remove other switch call SWITCH B
MARK THE COMMON WIRE
We assume this has 3 wires as you failed to say
There is a 50/50 chance L1 andL2 at switch B are same as other switch A
JOIN L2 to the common wire
Return to switch A power up and does the light now work with switch A
IF nothing isolate and this time Join other wire L3 to the common
Power up and try light again
Once correct seal off spare wire
If happy now isolate and replace switch A with dimmer using Same as said above earlier, 2 wires onto L1 from common and one wire from L2 goes to L2.
DIY how to tutorial projects and guides - Did you know we have a DIY Projects section? Well, if no, then we certainly do! Within this area of our site have literally hundreds of how-to guides and tutorials that cover a huge range of home improvement tasks. Each page also comes with pictures and a video to make completing those jobs even easier!