Ganging dimmer switches

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Old 07-14-14, 05:20 PM
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Ganging dimmer switches

I'm renovating my ensuite bathroom. There are now 3 switches in a ganged box:
Switch 1 powers an over-the-mirror light
Switch 2 powers a ceiling light
Switch 3 powers the exhaust fan on timer

I'm changing the applications somewhat:
Switch 1 will power 2 sconces, one on either side of the mirror. Don't know yet if lights will be 40 or 60w incandescent, CFL or LED.
Switch 2 will power ceiling track lighting with 3 heads using some combination of 35w and 50w halogen bulbs
Switch 3 will continue to be a fan timer

1. I'd like to put dimmers on both switch 1 & 2 but just read that heat buildup can be an issue when more than one dimmer is used. There was talk of "derating" a 750 watt dimmer to 600 watts. Does than mean a maximum of 600 watts of lighting or is it some measure of energy at the dimmer? Would I be OK with a total of 120 watts on Switch 1 and 150 on Switch 2? Does heat build when lights are dimmed or one they're on full or both?

2. I haven't touched a dimmer in years. Are there modern ones that are smaller and thus easier to fit in a box? Is there a name for that?

Thanks
 
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Old 07-14-14, 05:41 PM
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In neither of your applications will you approach 600 watts, so all is good. Modern dimmers don't produce as much heat as older ones do. All dimmers are made to fit into the provided space in switch boxes. Buy a quality dimmer and you won't have any problems.
 
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Old 07-14-14, 09:03 PM
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Thank you very much Chandler!
 
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