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UK - Installing Dimmer 2 in ceiling rose



Hi all,


I have a few Dimmer 2's around the house and they're all installed behind the light switch, however on this occasion I need to install it in the ceiling rose.


Is it possible with this wiring?



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yes it is mate

3 red wires are your permanent LIVE - 1 of which needs removing!!!

1 black wire is your permamnet NEUTRAL

1 green/yellow is your EARTH

1 black wire with RED TAPE is your SWITCH LIVE


However you will need to identify which of the 3 red wires is going to your switch and remove it as the dimmer 2 has its own switch connections into Sx and S1.


After identification you should have:

2 red LIVE wires into L of module

2 black wires into N of module and N of light

earth is earth

1 red wire that you identified as going to switch connected to Sx of module

1 black wire with red tape connected to S1 of module

light output of module connected to the light wire that is currently connected to the balck wire with red tape.


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Hi @Tom27,


i don't understand quite well your wiring, but it's always possible when you have life wire and neutral available :-D


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  • @morpheus75


    Thanks for the help!


    If I'm not mistaken, that just leaves the neutral of the light fitting - does that go into N on the module (so there would be 3 connected to N in total)?

    Edited by Tom27
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  • On 12/30/2020 at 2:25 PM, morpheus75 said:

    yes -

    sorry for late reply been on hols!!

     No problem. All working fine, thanks very much!

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