Wiring a dimmer switch


Postby kandrphillips@tiscali.co. » Fri Oct 12, 2007 6:59 pm

Hi. I am replacing a 1 gang switch with a dimmer switch. The existing switch has 2 red-live cables going to one terminal, 2 black-neutral cables going to another and 1 yellow to another. My 1 gang dimmer has only 2 terminals, one L1 and the other C. How do I wire this in? keith
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Postby sparx » Fri Oct 12, 2007 9:03 pm

Hi , you can't as you have a two way sw. at the moment but you have bought a 1 way dimmer!
Also for info the blacks are NOT neutrals they are sw. lives which should have been marked with red tape or sleeving, see Docs project 'replacing 2 way switches'
you will have another sw. somewhere also operating the same light from other side of room, this means 2 way switching and a 2 way dimmer is required which has 3 terminals.
regards SPARX
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Postby kandrphillips@tiscali.co. » Sat Oct 13, 2007 2:20 pm

Thanks - in the end I worked this out myself! However, I also have a problem with a one way dimmer for tungsten bulbs which causes the bulb to flicker and is therefore useless. Is there a dimmer, too for the energy saving bulbs, which are, of course, minature fluorescants? Keith
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Postby sparx » Sat Oct 13, 2007 9:35 pm

Hi Keith, is dimmer too high rated for lamp load? as this will cause flickering, mini fluorescent bulbs can't be dimmed very well yet but some makers promise new range 'soon' that can be dimmed, regards SPARX
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