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Old 11-23-2010, 07:37 PM   #1
Davey4000
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Default Dusk to Dawn Light Will Not Turn Off

I guess this is my day for electrical questions. I installed a 400W metal halide wall pack light yesterday. It did not come with a photocell for dusk to dawn operation so I added one. I just screwed the photocell into one of the ports on top of the housing.

I completed the work outside while it was still light and finished the wiring inside after dark. When finished I flipped the breaker and the light came on so I assumed everything was working properly.

The problem is the light did not go off when it got daylight this morning. Is this a defective photo switch? I think tomorrow Iíll shine a flashlight into it and see if it will turn off.

Perhaps my photocell needs to be relocated, but I donít really see that as a problem. It gets plenty of exposure. Has anyone experienced a similar problem?
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Old 11-23-2010, 07:48 PM   #2
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Default Re: Dusk to Dawn Light Will Not Turn Off

Not to question the obvious, are you sure it is wired properly? If so, it's unlikely that the photo cell is bad.BTW...... do you remember how you wired it........ colors?
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Old 11-23-2010, 08:07 PM   #3
Davey4000
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Default Re: Dusk to Dawn Light Will Not Turn Off

Yes, hot wire from power source (black) to black wire of the photocell; neutral from power source (white) to white wire of photocell and light; red wire from photocell to 120V wire of light (not black, but stamped 120V).

Oh, and green ground wire to green wire of light.

Last edited by Davey4000; 11-23-2010 at 08:09 PM.
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Old 11-23-2010, 08:25 PM   #4
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Default Re: Dusk to Dawn Light Will Not Turn Off

I don't have a PC in hand, but from my memory I believe that is correct. Can you shine a light directly into the eye of the PC , and keep it there for a minute or so? Obviously, by doing so if it is working properly, the light has to go out. Other than that, I guess a new PC.
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Old 11-23-2010, 08:34 PM   #5
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Default Re: Dusk to Dawn Light Will Not Turn Off

Again not to be a smart ass but are you certain the voltage rating of the photo cell is right?
Is it an Intermatic brand? I have had a few of those be bad out of the box over the years. I like Tork much more.
How you have described the wiring is correct though.
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Old 11-23-2010, 08:41 PM   #6
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Default Re: Dusk to Dawn Light Will Not Turn Off

It came from Home Depot or Lowe's. Can't remember which. I gave about $14 for it. It's an Utilitech part number 006311 manufactured by Bright Image Corporation, Hillside, IL.

Specs: 1800W maximum, 110-130 VAC/1000VA Ballast.

It won't be a problem to shine a light into it. My scaffolding is still up.
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Old 11-24-2010, 08:33 AM   #7
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Default Re: Dusk to Dawn Light Will Not Turn Off

Well, it didn't shut off this morning either. It's a bright sunny day. I held a flashlight on the photocell for about 3 minutes, still stays on. I suppose I'll take the photocell off and try it on something else just to make sure it's working.
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Old 11-24-2010, 02:38 PM   #8
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Default Re: Dusk to Dawn Light Will Not Turn Off

Don't waste your time trying it on something else, just replace it. It's a dud, it happens.
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Old 11-25-2010, 07:26 PM   #9
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Default Re: Dusk to Dawn Light Will Not Turn Off

Did ya remove the foil sticker covering the photocell eye ?
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