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If there are two black wires, it's possible that it was wired for a ceiling fan and that one of the wires is for the fan part while the other is for the light part. If so, one of the black wires may be switched while the other is always "on."

Normally black is "hot" and white is "neutral" (NOT ground... ground is usually green).

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Q: If there are two black and one white wire in ceiling light do I need to use both black for the switch to work?
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You bought a new light it has 1 black and 1 white in the ceiling there are 2 black 2 white and a red in the the wall switch there are 2 black 2 white 1red the red and black are hooked up you need help?

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New ceiling fixture goes on as soon as power is back even though switch is off?

You switched the power and switch wires. There should be two sets of wires in the ceiling box. 2 black, 2 white, 2 bare. Two groups of three. The white wire going to the light is the incoming wire. The black one in that group is the power coming in. Take that black wire and connect it to the other black wire. The second black wire goes to the switch. The power comes back to the light on the white wire of that set. Connect that white wire to the black wire in the fixture. The switch should work now. That is if everyone wired the house the way it is supposed to be.


Have 3 lights Power to light 1 Need to connect light 2 then light 3 then down to single pole switch How do you wire?

You would wire the switch to the first light. Code says to break the black or power side of the circuit. Connect the white to the light. Take the black down to the switch on the black wire and back to the light on the white. This is a line of wire from the light to the switch. From the first light, take the white and the return white from the switch to the second with another run of wire. This will be regular black white with ground. White to white and at the first light the return line from the switch is white but hook to the black to the second light. Second light to third just continues the two wires. Black to black, white to white. I think this is clear enough to follow. If not, ask again.


What are the live and neutral wires in a ceiling light?

Black is hot and white is neutral.


In the US where do the blue red green and white wires on a fan go to when the ceiling has red black bare copper and white wires?

Black to Black - Black from the ceiling is a hot wire and should be switched Red to Blue - Red wire is another hot wire and should also be switched White to White - White from the ceiling is the neutral and should not be switched. Your wall should have two switches, one will control the red wire, one will control the black wire. If you wire your fan as above, one switch will turn the fan on, the other will turn the light of the fan on.

Related questions

You bought a new light it has 1 black and 1 white in the ceiling there are 2 black 2 white and a red in the the wall switch there are 2 black 2 white 1red the red and black are hooked up you need help?

See discussion page


New ceiling fixture goes on as soon as power is back even though switch is off?

You switched the power and switch wires. There should be two sets of wires in the ceiling box. 2 black, 2 white, 2 bare. Two groups of three. The white wire going to the light is the incoming wire. The black one in that group is the power coming in. Take that black wire and connect it to the other black wire. The second black wire goes to the switch. The power comes back to the light on the white wire of that set. Connect that white wire to the black wire in the fixture. The switch should work now. That is if everyone wired the house the way it is supposed to be.


Have 3 lights Power to light 1 Need to connect light 2 then light 3 then down to single pole switch How do you wire?

You would wire the switch to the first light. Code says to break the black or power side of the circuit. Connect the white to the light. Take the black down to the switch on the black wire and back to the light on the white. This is a line of wire from the light to the switch. From the first light, take the white and the return white from the switch to the second with another run of wire. This will be regular black white with ground. White to white and at the first light the return line from the switch is white but hook to the black to the second light. Second light to third just continues the two wires. Black to black, white to white. I think this is clear enough to follow. If not, ask again.


In the US where do the blue red green and white wires on a fan go to when the ceiling has red black bare copper and white wires?

Black to Black - Black from the ceiling is a hot wire and should be switched Red to Blue - Red wire is another hot wire and should also be switched White to White - White from the ceiling is the neutral and should not be switched. Your wall should have two switches, one will control the red wire, one will control the black wire. If you wire your fan as above, one switch will turn the fan on, the other will turn the light of the fan on.


What are the live and neutral wires in a ceiling light?

Black is hot and white is neutral.


3 speed ceiling fan w light and pull chains single wall switch has blue for motor Tried black black blue and white white and both greens to bare etc Can get fan and light working but light stays on?

I had the same experience. If the fan turns on/off with its pull chain but the light doesn't, then the switch behind the light's pull-chain is broke and needs to be replaced.


How do you wire a light and switch with the 2 wire old romex?

with a standard 1 pole light switch (one switch operating the light) it is black wire to black wire and white to white (non grounded)


How do you connect a ceiling fan with white green black and blue wires on the ceiling fan?

Black wire goes to (line) which is 110v comming in to ceiling box from light switch. It will connect to either black or red, which ever they ran. White is neutral and connects to white in box. Blue is for the light kit if you are using one. You may also connect it to the black if you just use the chain to turn on light.


How do you connect a ceiling fan with white green black and blue wires one the ceiling fan?

This sounds like a ceiling fan that also has a light attached to it. The black and white wires are used for the incoming supply voltage. The green is the ground wire. The blue wire is most likely the wire that goes to the lamp portion of the ceiling fan. The black and blue wires are separated from each other in the fixture so that the fan motor and the light can be independently switched. In these types of installations a three wire cable is strung from the fan switch box to the fixture box.For independent switching, the junction box should be a two gang box. From the power source in the switch box, the white wires all connect together. The incoming black connects to the top of the two switches in the two gang box. Bottom of the first switch to the black in the three wire cable, Bottom of the second switch to the red wire of the three wire cable.At the fixture junction box, incoming white wire to the fan white wire. Incoming black wire to the fan black wire and incoming red wire to the fan blue wire. If wired this way the light and fan motor can be individually switched on and off.If there is only one switch box, at the fan junction point connect the black and blue wires together to the incoming black wire. White to white wires together and green wire to the ceiling junction boxes ground terminal. In this configuration the switch will turn on both the fan and light at the same time.


If you have a switch wired red and black and a fan that calls for black and white where does the red wire go?

It sounds like your fan also has a light with it. If your wall switch is a two gang box with two switches in it most likely one switch is for the light on only and the other switch is for the fan on only. This can be checked out by installing the fan and making the connection green to green, white to white, black to black. Turn on one of the switches and see if the fan operates. Disconnect this connection and then connect the red wire to the black fan wire. Turn the other switch on. If the fan turns on again, then the two switches were installed to operate the fan and light separately. If this is the case disconnect the red and fan black wires and reconnect the black to black. This is the fan connection. Connect the red to blue fan wire and this is the light on the fan connection.


How to connect electricity wire to three wired out ceiling fan?

Some ceiling fans have a black, white and sometimes blue wire. The blue wire in this case is so you can switch a light separate from fan. If your fan doesn't have a light just put a wirenut on extra wire and ignore it. If you do have a light and want it switched you'll need an extra wire run to fan, and switch that wire for light.


Can you install a ceiling fan with light replacing your current ceiling fan that does not have a light?

Answer for USA, Canada and countries running a 60 Hz supply service.Yes you can, but the light will only come on when the fan is operating. If there is a three wire going up to the fan from the light switch box then it was pre-wired so that a separate run for a light to be operated independent from the fan. The cable will be a red, black and white wire. The black will connect to the fan, the red to the light in the fan and the white to both the neutrals of the fan and light which is up in the fan housing.If the switch box is only a single gang box there is a duplex switch that can be installed in the box. The cover for this duplex switch is the same cover as a duplex receptacle cover.