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Q: Why do you need to ground a light fixture?
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What if the light fixture has two copper house wires?

If you mean 2 bare copper wires those are the ground wires. Tie them together and then connect the light fixture ground wire which will be green or bare copper to those ground wires.


Where do you hook the ground wire on a porcelain light fixture on a metal box?

Connect the ground wire to the metal box.


Is is ok if the lighting fixture ground wire is wrapped around the bottom of the chain and the ground wire from the light box is connected to the ground screw on the mounting crossbar?

If you are referring to a porcelain or plastic ceiling light fixture most do not have a place to connect the ground wire. You cannot ground these type fixtures. Just connect the ground wire to the mounting crossbar and forget about connecting it to the light itself. It is on the ceiling and will never be touched unless you change the bulb and then you will have the switch in the off position. It is perfectly safe.


Do you have to Connect both fixture and house ground wires?

If you're asking whether you have to connect the fixture ground to the house ground, you do. The idea is to connect any exposed portion of a metal fixture to ground, keeping anything you would be able to touch from having a hazardous potential on it. The way to do this is to connect the fixture ground (which is connected to the metal chassis) to the building ground (which comes from your electrical panel).


Do you need a junction box for each light fixture?

Can lights have a junction box attached to them. So yes.

Related questions

What do I attach the green wire from the light fixture to?

The green wire on the light fixture is a ground wire. If there is no ground wire in the conduit, the green wire should be attached to the metal box with a screw.


I am installing a kitchen light fixture in the ceiling. While pulling down the old fixture the green ground wire broke. The new Fixture has a green ground wire. Where do I ground it to now?

The fixture box should have a ground screw on the bottom of the box. Sometimes you have to move other wires out of the way to see it. Just reconnect the fixture ground wire to this screw.


Can you run power from a light fixture to another light fixture?

Yes. Connect Black to Black, White to White and bare ground wires together.


What if the light fixture has two copper house wires?

If you mean 2 bare copper wires those are the ground wires. Tie them together and then connect the light fixture ground wire which will be green or bare copper to those ground wires.


Do light fittings need to be earthed?

Normally the fixtures come with a grounding screw that you attach the grounding wire to. If the box you attaching the fixture to is metal and there is no grounding wire present then the grounded conduit should ground you fixture.


Where do you hook the ground wire on a porcelain light fixture on a metal box?

Connect the ground wire to the metal box.


Is a fluorescent light grounded?

If you are talking about the lamp then the answer is no. If you are talking about the fluorescent fixture, it should be. It is the fixture grounding that helps the tube to ignite. because of the close proximity to the metal of the fixture. There are many occasions when the fixture will not operate, but as soon as the ground is connected the fixture operates fine.


How do you ground a fixture if there is no ground wire from the wall and is it absolutely necessary to use the ground wire from the fixture or can you just cover it?

If you don't have the wire then you just can't ground it. This should not be too much of a problem. Most light fixtures are not grounded and some don't even have ground wires.


No ground wire from incoming outlet box. do I have to have one. This is for a light fixture in the bathroom?

See discussion


Is a light bulb considered a fixture?

A fixture is what the light bulb goes into.


Troubleshooting 40 year old outside wiring to light fixture?

Yes


Is is ok if the lighting fixture ground wire is wrapped around the bottom of the chain and the ground wire from the light box is connected to the ground screw on the mounting crossbar?

If you are referring to a porcelain or plastic ceiling light fixture most do not have a place to connect the ground wire. You cannot ground these type fixtures. Just connect the ground wire to the mounting crossbar and forget about connecting it to the light itself. It is on the ceiling and will never be touched unless you change the bulb and then you will have the switch in the off position. It is perfectly safe.