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 Post subject: Led dimmers query
PostPosted: Sun Feb 17, 2019 3:53 pm 
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Hello

I would like some technical advice please.


I would like a 3 gang led dimmer switch. From what I’ve read, trailing edge is best. This would be the light controls for 3 separate rooms.

Room 1 would have 8 x 5w dimmable LED bulbs (chandelier).

Room 2 would have 3 x 5w dimmable LED lights (chandelier).

Room 3 (corridor) has 6 x 5w non-dimmable led bulbs ( 2x chandelier).

My questions are these;

In room 3 (corridor) I have non dimmable bulbs(6 total, 5w each). I am not Interested in this room being dimmed therefore will my existing LED,s still work full power with the dimmer switch? I don’t really want to install a second switch as I want to keep things nice and neat.

Room 3 (corridor) can also be controlled on/off with a standard switch on another floor. Would this still work as normal if I installed the 3 gang led dimmer switch?

Any help would be much appreciated and any obvious pitfalls I’ve not mentioned would be highly appreciated

I am uk based.

Thanks in advance


Sent from my iPad


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 Post subject: Re: Led dimmers query
PostPosted: Sun Feb 17, 2019 6:43 pm 
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Presumably, you already have these lights and a normal on/off switch?

If its a normal 3 gang switch, you can not swap it to a 3 gang dimmer, the reason is a 3 gang dimmer is wider than a 3 gang on/off switch. (You have to "bash the wall a bit" to make a wider/deeper box fit)

Room 3 will NOT work as normal..............because you have a dimmer switch.

You could always opt to have a grid switch (You can make any combination you want or need)

Oh, you were right about trailing edge dimmers


Below is a conventional 3 gang switch
Image


Below is a conventional 3 gang dimmer
Image


The 3 gang dimmer is twice as wide as a 3 gang on/off switch

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 Post subject: Re: Led dimmers query
PostPosted: Mon Mar 04, 2019 9:48 pm 
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could you not use the mk frame with 3 modules, 2 dimmer and 1 switch with a double back box?


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 Post subject: Re: Led dimmers query
PostPosted: Tue Mar 05, 2019 5:21 am 
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The dimmers are wider than the average switch, so even one on each outside will not leave enough room in the middle, then you have the problem of heat build up, besides the OP asked last month and has never been back since. :sad: (Even then, he only stayed for 12 minutes)

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 Post subject: Re: Led dimmers query
PostPosted: Tue Mar 05, 2019 5:53 pm 
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Most LED bulbs really do not care if leading or trailing edge, if you want two switches with same set of lamps there are two options, one is a pull push switch on/off and a standard three way switch in the other position, the other method is a master and slave, with the latter you can change amount of dimming from either switch, there is a third method when the dimmer is in the ceiling rose.

So with three switches together you have to decide where to fit the dimmer, either a double back box, or dimmer switch other end, or in ceiling rose. The problem is many have a minimum wattage or require a neutral and prices can get silly.


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