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Home > Archive > Electrical code Compliance > June 2005 > LED & Motn Dtxr
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| vjp2.at@at.BioStrategist.dot.dot.com 2005-06-17, 11:30 pm |
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Do LED light bulbs have any negative effect on fancy switches like
motion detectors? I have only had experience with someone plugging a
vaccuum cleaner into an outlet with a motion detector hence blowing
the switch.
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Vasos-Peter John Panagiotopoulos II, Columbia'81+, Bio$trategist
BachMozart ReaganQuayle EvrytanoKastorian
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| phil-news-nospam@ipal.net 2005-06-17, 11:30 pm |
| On Mon, 25 Apr 2005 10:52:44 +0000 (UTC) vjp2.at@at.biostrategist.dot.dot.com wrote:
| Do LED light bulbs have any negative effect on fancy switches like
| motion detectors? I have only had experience with someone plugging a
| vaccuum cleaner into an outlet with a motion detector hence blowing
| the switch.
Maybe the vacuum cleaner drew more current than the switch, included for
only turning on a light, could handle. They can draw quite a lot of amps
all of a sudden.
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| Andrew Thomas 2005-06-17, 11:30 pm |
| phil-news-nospam@ipal.net wrote:
quote:
> On Mon, 25 Apr 2005 10:52:44 +0000 (UTC) vjp2.at@at.biostrategist.dot.dot.com wrote:
>
> | Do LED light bulbs have any negative effect on fancy switches like
> | motion detectors? I have only had experience with someone plugging a
> | vaccuum cleaner into an outlet with a motion detector hence blowing
> | the switch.
>
> Maybe the vacuum cleaner drew more current than the switch, included for
> only turning on a light, could handle. They can draw quite a lot of amps
> all of a sudden.
>
So can incandescent bulbs, on turning on. And the capacitive front ends
of switching power supplies, which might be used to supply LED's. It's
certianly true that motors make for some very heavy loads on turn-on,
and for a longer period of time than bulbs and switchers. I wonder if
the peak is as high as an incandescent? Or switcher?
It may have been the start-up current, but it may well have been the
steady-state power requirements of the vacuum that burned out the
detector: most dimmers are rated 600W, many vacuums tout 1200W or more
watts of "power". I suppose there is a chance the inductive nature of
the load had as much or more to do with it. Was the vac plugged in
"through" the detector, or simply on the same circuit? Did it burn out
"immediately"? After a few seconds? Minutes? On turning off the vacuum?
In any case, I would lean toward thinking that any detector designed to
handle the inrush to a tungsten bulb could handle the inrush to a small
switcher, so it should be an apples to apples proposition.
-Andrew
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