Hook up photocell

The photocell, sometimes referred to as a photoresistor or light-dependent resistor (LDR), is a two-terminal, resistive component that increases or decreases its.
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On most wire strippers there is a guide on the side that shows how much insulation should be stripped. To make it easier, line up the black wire of the new fixture and the black box wire and twist them together using the needlenose pliers. Place a wire nut over them and screw it on until tight.


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Do the same thing with the white wires. Cut a 3" piece of electrical tape and tightly wrap it around the wire nut where it meets the wires. Gently push the wires back into the box. Connect the fixture to the box with the bolts supplied. It may be easier to start tightening the bolts by hand so you can line the holes up and then tighten everything down using the screwdriver. Also, make sure no wires are outside of the box.

Install new light bulbs as rated by the fixture's manufacturer. Now turn the power back on, the lights should automatically come on and stay on for a few minutes, even if it's daytime. You are all set to clean up. You can test your photoelectric eye by placing strips of electrical tape over the "eye. If it's working properly, the light should turn on within a few minutes.

Wiring a Photo cell. (Dusk to Dawn)

Many exterior light fixtures come with "knockouts" to make installing photocells or motion sensors easier. These instructions are for a fixture with a "knockout. With the fixture removed, you will see a "knockout" somewhere on the plate or the face of it. It will be round and it may have a slit through it so you can unscrew it with a screwdriver. The photoelectric switch should come packaged with a rubber ring gasket.

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Fit the wires through the gasket and move the gasket over the threads so it's right up against the base of the photocell. Guide the wires through the "knockout" hole on the fixture. With the wires through the hole, use the locknut that came with the photocell to secure it to the fixture.

On the inside of the fixture, use the silicone sealant to seal around the knockout where the photocell is located. This will help keep water out. There should be a black, white, and red wire coming from the photocell.


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  • Install a Photoelectric Switch?
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  • The white wire gets connected to the white wire of the fixture and the white wire of the wall box. See the wiring step above for instructions on connecting wires. This is a replacement.


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    Wires are hanging out of a hole in the roof eve underpinning. Should I connect it to one of the screws that hold the plate cover for the photocell? There is an outside can type light on the eve of the house. When new vinyl underpinning was place on the eve, the workers took off the existing photocell. They cut a hole on the underpinning and left the wires hanging out. They threw the photocell away.

    Hook Up Photocell Light Hook Up Pool Vacuum To Skimmer

    There are 3 wires and a ground wire hanging out of the hole. I purchased the same type photocell - it has 3 wires coming out of a small box, no place to hook the ground wire, and has a face plate to put on the outside of vinyl underpinning. Then, there is 1 bare ground wire. My new photocell has 3 wires:.

    Wiring a Photocell for an Outdoor Light Fixture

    I know how to hook these wires together. I just don't want to hook this photocell up with a loose ground wire. I was taught that there is a good reason for a ground wire if one is there. Please clarify your specific problem or add additional details to highlight exactly what you need. See the How to Ask page for help clarifying this question. If this question can be reworded to fit the rules in the help center , please edit the question. Many light fixtures and other devices can be safely used without connection to a grounding conductor.