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Old 04-17-2008, 09:57 PM   #1
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Dimmer causing interference - Help


I've purchased a dimmer switch (3 way) to control some recessed cans (Halo) in my basement. However, the dimmer switch hums and when on causes EMI to travel along the coax feeding my HDTV. With the switch turned off the EMI goes away. Is it a faulty dimmer? I swapped it out for a non-dimming switch, and the EMI is not a problem when the lights are on.

Thanks!

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Old 04-18-2008, 06:38 AM   #2
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Dimmer causing interference - Help


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Originally Posted by scottmatt View Post
I've purchased a dimmer switch (3 way) to control some recessed cans (Halo) in my basement. However, the dimmer switch hums and when on causes EMI to travel along the coax feeding my HDTV. With the switch turned off the EMI goes away. Is it a faulty dimmer? I swapped it out for a non-dimming switch, and the EMI is not a problem when the lights are on.

Thanks!
Make sure your dimmer is sized to handle the load. Dimmers are sized based on the load (watts) they need to handle.

Jeff

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Old 04-18-2008, 07:23 AM   #3
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Dimmer causing interference - Help


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Make sure your dimmer is sized to handle the load. Dimmers are sized based on the load (watts) they need to handle.

Jeff
Thanks Jeff. There are a total of 6 cans on that switch (all using Low-E CFL's 14w usage for 65w equivalent). So to calculate the load, do I just multiple the amount of cans by the wattage of the cfl's?
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Old 04-18-2008, 07:33 AM   #4
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Dimmer causing interference - Help


Are these dimmable CFL's? Most are not.
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Old 04-18-2008, 08:23 AM   #5
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Dimmer causing interference - Help


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Are these dimmable CFL's? Most are not.
The CFL's currently installed are not...but ultimately (after construction) I plan to install Dimmable CFL's (expensive buggers!).

I thought that might be the problem, but even when the dimmer is set to full power, the problem persists.
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Old 04-18-2008, 10:08 AM   #6
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Dimmer causing interference - Help


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I thought that might be the problem, but even when the dimmer is set to full power, the problem persists.
Pull the CFL's and put in some incadesants. You problem may go away.

Jeff

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