Originally Posted by 2long4u
The dimmer was rated for 600w I had 480w running through it but now I only have 112w with the cfl's they take a little while to warm up but the savings are worth it.
I've never had a problem using a 110v dimmer with 12v lighting before. You wire it in before the transformer.
Not a great idea to control a transformer with a dimmer, unless the dimmer and transformer are made for it.
For one thing, most dinners state resistive or incandescent load only. Using them on anything else can cause them to malfunction and to overheat.
Most dimmers are Triac controlled devices, which do not let through the entire sine wave. The closest to that is full on, and even it is not a true sine wave.
Becuse the sine wave gets chopped off at the beginning, you have a very sharp rise on the pulse, something which transformers do not tolerate all that well.
The transformer may overheat, or it may just not give you the efficiency, or the output you would expect.
But I suppose that if all the transformer is powering is lighting, it doesn't really matter all that much.
If it works, use it.