Very often the ground wire in the fixture is ignored, or just connected to the box, if there isn't a conductor to connect to. This, however, is a code violation as any fixture with a ground wire is required to have it properly connected to an equipment grounding conductor back to the panel. This is for YOUR SAFETY. Technically you should rewire the circuit with the proper conductors.
It is BAD PRACTICE to connect the ground wire to the neutral or white wire because this could create a hazard of its own.
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.
To properly wire a light fixture in a room, first turn off the power to the circuit. Then, connect the black wire from the fixture to the black wire in the electrical box, and the white wire from the fixture to the white wire in the box. Finally, connect the ground wire from the fixture to the ground wire in the box. Secure the connections with wire nuts, and then mount the fixture according to the manufacturer's instructions.
Don't worry about it some fixtures have no ground terminals. just shove the groung wire to the back of the box. Correction, if the fixture is metal and it shorts out, the metal surrounding the fixture could become electrified. That's why fixtures today are normally grounded to their mounting plates and then the lead is attached to the incoming romex. In the past, attaching these plates to metal boxes (either grounded by an incoming wire or grounded to the BX cable) eliminated the need for a ground wire. If the hot wire hit or shorted to the fixture, it would blow a fuse or circuit breaker. Many electrocutions and fires later, the folks at Underwriters realized that even that method of grounding wasn't sufficent (the old aluminum boxes and bx cables were crappy conductors. Solution; (and I practice what I preach because I remodel many old homes) get a little creative and spend the extra time to wrap a little ground wire to a mounting screw, or piece of metal, on the mounting plate of the fixture and then attach it to your incoming romex ground. On an old fixture, it could mean the difference between a fire and a tripped circuit breaker. If you have any metal boxes, old or new, ground to those too. <><><> Connect a pigtail to the metal canopy, and use a wire nut to connect the safety ground to it.
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.
To ground a light fixture properly, connect the green or bare copper wire from the fixture to the grounding wire in the electrical box using a wire connector. This helps prevent electrical shock and ensures safety.
The green wire from the light fixture should be attached to the ground wire in the electrical box to provide grounding for safety purposes. This helps prevent electrical shocks and protects against electrical malfunctions.
Connect the ground wire to the metal box.
The bare copper wire is a ground wire. if your old electrical system only has black and white, then you don't have a ground wire to hook the new fixture's ground to. Safest bet is to run a ground wire to that junction box (or hire an electrician to do that). If the box in the ceiling (I'm assuming its a ceiling fixture) is metal, the home's electrical system ground wire may be attached to the metal box itself. If that's the case, you simply need to attach your new fixture's ground wire (the bare copper one) to the metal box. If in doubt -- have an electrician look at it.
To wire up a light bulb in the well house, first, ensure that the power is turned off at the circuit breaker. Use a suitable light fixture and connect the black (live) wire from the power source to the fixture's black wire, and the white (neutral) wire to the fixture's white wire. Ground the fixture by connecting the green or bare copper wire to the ground screw. Finally, secure the fixture, install the bulb, and restore power to test the light.
To wire fluorescent lights properly, follow these steps: Turn off the power to the circuit. Remove the cover of the light fixture. Connect the black wire from the power source to the black wire of the light fixture. Connect the white wire from the power source to the white wire of the light fixture. Connect the ground wire from the power source to the ground wire of the light fixture. Replace the cover of the light fixture. Turn on the power and test the lights. Make sure to follow all safety precautions and consult a professional if needed.
A ground wire is a typically uninsulated copper wire. The intent is to connect the wire to an electrical appliance or fixture to provide electricity a path to ground in the event of a short, thus preventing electrocution.
Romex is a manufactures brand name of NMD90 house wire. It comes in different sizes , the most common being 2C-14 3C14 2C-12 and 3C-12. For branch circuit house wiring to wall receptacles 2C14 is used. This cable comes with a black and white #14 wire and a bare ground #14. The bare ground is used to ground the receptacle to the ground bus back at the distribution panel.