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Old 02-19-2011, 11:34 PM   #1
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3 way motion light switch


Hello,

I just installed a 3 way motion switch in my kitchen after intense research i was able to find the way the wires were ran.

power throught light fixture and than to the 2 switches (see attached photo)

it powers a light and fan fixture in kitchen

now my problem is when the motion switch is in auto mode and just the lights are on i hear humming or buzzing from the breaker box and motion switch

when the fan is on with the lights no buzzing
when the switch is set to just on no buzzing
when just the fan is on but i pull the string to shut off just the light no buzzing

i have those energy effecient florecent bulbs in the fixture 3 60 watt
the motion switch is 500 watt rated 3 way
square d panel with a 20 amp breaker

any comments on why there is a humming sound?
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Old 02-20-2011, 11:21 AM   #2
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3 way motion light switch


those switches are not designed to use CFLs. Install old fashion bulbs.

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Old 02-20-2011, 11:58 AM   #3
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is it bad to leave those bulbs in do i have to worry about that humming or if i can ignore it is it safe? i was always told humming was moving parts, moving parts generate heat, heat make fire so just double checking here?
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Old 02-20-2011, 03:27 PM   #4
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3 way motion light switch


it will cause premature failure if anything. I would not recommend leaving the situation as is
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Old 02-20-2011, 03:34 PM   #5
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well just got back from lowes and i took out the CFL's and put in the old style bulbs and the humming stop i guess if ur trying to go green be selective of what you want the switch or CFL's thanks cowboy for the suggestions
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Old 02-20-2011, 09:33 PM   #6
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3 way motion light switch


As a reference to future readers, a rule of thumb is that if there is NO neutral on an electronic switch (motion or timer etc) it is NOT designed to be used with ANY fluorescent lamps, either linear or CFLs.

You need to find a 3 way motion switch that has a neutral if you want to use CFLs.
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Old 02-20-2011, 09:53 PM   #7
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lyons i thought i did buy the right one on the package it said 3-way motion switch used for up to 500 watts of incandecent or 400 watt of fluorescent lighting of 2 tubes min. requies magnetic ballets only. what does that mean ?is my wiring wrong?
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Old 02-21-2011, 12:45 AM   #8
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Quote:
Originally Posted by souciej View Post
requies magnetic ballets only.
AHH HA! Yes that would allow you to use florescent because there is a device(read old school ballast) that hides them from the switch in this case. It would only work with old ballasts and most are not now and CFLs
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Old 02-21-2011, 01:55 AM   #9
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3 way motion light switch


It depending on what type of luminaire I know with ceiling fans the trick I do is install one indenscent bulb the rest with CFL that useally take care the issue but really I rather do the correct way by double check the listing on the package when you get the motion switch etc.


Merci.
Marc

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