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In a DC application, black is always Negative, so the white wire would be +12v and black would be Negative.

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Q: What is the polarity of wires when you have a black and a white wire on a 12 volt radar?
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What are black with green and black with white wires mean?

It means that the wires has different colors on it. I have an awkward family


How do you install a swag kit with two wires to a light with three wires?

I am guessing that your 3 wires are black (hot), white (neutral) and bare or green wire (ground). Connect black to black, white to white and ground wire to the metal case of swag kit.


Have a red white black wires for a dryer plug what wires are hot ones?

Should be 220 to 240 V between Red and Black and 1110 to 120 V between Red and White and between Black and White.


How do you hook up new black white and green wires to 2 old white wires and 2 old black wires?

More information is needed as to what device you are connecting to what power supply. The only two identifiable wires are the white and green. In North America the white colour is used for the circuit's neutral and the green is used for grounding of devices.


Outside porch lamp has no box just two wires coming in black wires are tied and don't connect to fixture just the white wires what is going on here?

You would have to provide more info to be certain what your problem is. Typically a black and white wire would connect to the two wires on the light fixture. The fixture should also be controlled by a switch that "breaks" the black (Hot Wire) to turn off the fixture. If you have a volt meter you can see if there is 120Volts between the black and white wires with switch on. If there is a single white wire going to fixture (Neutral), where is the "black wires tied" to. Maybe one of the black wires has broken off the fixture.

Related questions

What are black with green and black with white wires mean?

It means that the wires has different colors on it. I have an awkward family


How do you install a swag kit with two wires to a light with three wires?

I am guessing that your 3 wires are black (hot), white (neutral) and bare or green wire (ground). Connect black to black, white to white and ground wire to the metal case of swag kit.


Have a red white black wires for a dryer plug what wires are hot ones?

Should be 220 to 240 V between Red and Black and 1110 to 120 V between Red and White and between Black and White.


What wires match up on a ceiling fan where wires coming from a transformer - are black grey purple white?

White to neutral, black to line, gray to fan and purple to fan.


My light fixture has writing on one wire but not the other?

If both wires are black then the one with the writing is the neutral wire. If the two wires are black and white then the white one is the neutral.


How do you hook up new black white and green wires to 2 old white wires and 2 old black wires?

More information is needed as to what device you are connecting to what power supply. The only two identifiable wires are the white and green. In North America the white colour is used for the circuit's neutral and the green is used for grounding of devices.


What are the colors of the wires on a duplex outlet?

Black, white, and copper.


Why are the black and white wires hot?

It is because the nec standard.


How do you fix reversed polarity in a home inspection?

reversed polarity in an electric circuit, means whoever was doing the wiring had no knowledge of wiring. reversed polarity means that wires ( mostly on outlets) are incorrect. the black wire goes on the gold screw, the white goes on the silver one & the bare wire goes on the green screw. most home centers have a library of how to books. they average around $20.00 each.


Outside porch lamp has no box just two wires coming in black wires are tied and don't connect to fixture just the white wires what is going on here?

You would have to provide more info to be certain what your problem is. Typically a black and white wire would connect to the two wires on the light fixture. The fixture should also be controlled by a switch that "breaks" the black (Hot Wire) to turn off the fixture. If you have a volt meter you can see if there is 120Volts between the black and white wires with switch on. If there is a single white wire going to fixture (Neutral), where is the "black wires tied" to. Maybe one of the black wires has broken off the fixture.


Hot wires in home wiring are normally colored and ground wires in computers are normally colred?

hot wires are black, white wires are ground


How do you wire 220V with 2 black 1 white wire?

Your black wires are your hot wires. The white is your neutral or common. It would be best to run an equipment ground (green wire) too.