Connecting a two wire light fixture to a three wire power supply cable is not an ordinary occurrence. I recently had the need to change a light fixture and noticed that the existing light fixture box when opened the fixture uses white cables on both the sides of the fixture instead of one white and the other black.
Swap Out Those Old Crappy 3 Way Light Switches For Good Cnet
3 black wires 3 white wires light fixture. 1 set has incoming 120v power 1 set goes to another location to provide 120v power or to another light fixture and the last set goes to the switch. The grounds get tied together as well. That is the black wire showing 110v. Only 1 of the black wires seem to be hot lights up the voltage tester when touching the 3 whites and one black together. One set of wires is coming from the breaker box. New light fixture 3 black wires 3 white wires the switch in the foreground has a black and white conductor going to screws on the nearside of the switch and it looks like the red conductor goes to the far side of the switch.
Turn off the power at the breaker. Im currently working on replacing a ceiling light fixture on an older house built 1895 and have stumbled across a problem. When i put all 3 black together and all3 white together the light works as long as the switch is in the off position. I think the old fixtures black wire was connected directly to black. The lighting could be added to the three wire cable provided that the circuit breaker is no more than 15 amps and the wire size is no greater than 14 gauge. Three wire supply cables generally carry red and black hot wires of 110 to 120 volts each with a single white neutral wire.
The other black and white wires are the electrical circuit for the switch. If this does work the single white wire should have a black marking on it to show it is sometimes hot. I have three pairs of black and white wires plus the additional 2 wires from the fixture making 8 wires in total. If the light can be turned on or off from switches at each. Attach the white wire from the fixture to the white bundle. All should be well.
Unfortunately i forgot to mark some of the wires from the previous configuration. There was also a white wire connected to two wires which then was connected to my old light fixtures white wire. All lights have been working fine for several years. Attach the black fixture wire to the single wire. If not write back. Based on the photos there are 3 sets of black and white wires.
The light fixtures may have a green wire which goes to the ground wire or the fixture may also have a copper ground wire so it goes to the ground. One of the black and white wires goes to the light fixture. Are you able to identify these wires and where they go. Ask your own electrical question. I have 3 white wires and 3 black wires in a light fixture. The other two black wires trigger no response.
Attach the ground to the bare or green ground wire if present or to the metal box if no ground wire wire or leave alone if no wire and a plastic box. As you install lights fixtures in each box the black from each fixture get wired to the black and the white to the white. Basement finished few years ago and electrician did all the wiring and gone.
Gallery of 3 Black Wires 3 White Wires Light Fixture
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