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It is because the nec standard.

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Q: Why are the black and white wires hot?
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Related questions

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

hot wires are black, white wires are ground


Which of the two wires is hot which is neutral?

If this is a home wiring question and the wires are black and white then black is Hot and white is Neutral. If you also have a red wire, it is the other hot wire, and either the black or the red wire to the white one would be 120 volts, and red to black would be 240 volts.


Is black the neutral wire?

no in resd. it's hot normally but if wired oppisate 2006 irc code


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

Black is hot and white is neutral.


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 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.


What to do with the white wire in track light with black green and white wires if the house does not have a white one?

The white is neutral. The house does have a neutral wire even though it may be black. One of those black wires is the neutral and the other is the hot wire. You will have to determine which is hot and which is neutral. You can easily do this with a voltage tester. The wire that lights the tester is the hot. When you wire the light simply wire the hot to hot, and the white and green to the other wire.


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.


What color is the hot wire in a power window in a 2004 Chrysler sebring?

The wires for the left front window are red/black for up and green/black for white. For the right front window, the wires for up are red/white and the wires for down are green.


How do you install 220 receptacle with white black and bare wires?

Assuming the wires are the correct gauge for application and breaker you use black and white wires as hot. Put red electrical tape on each end of white wire and connect red and black to the breaker output and bare wire to ground lug in panel. At receptacle connect black and red to hot contacts and bare wire to ground lug.


You have two white wires and two black wires which one is the ground?

black wire is hot wire .And the white is the common or white is ground. Depends on what your talking about in an outlet or car battery. In a outlet the ground wire is green or bare copper. neutral is red and hot is black (I remember it by hot can kill you so black is death) if I am not mistaken. As for a car battery i think it's the opposite red is hot and black is neutral.


How do you connect a 240 v cooktop with 4 wires to a service panel with 3 wires?

The new cooktop has a 4 wire connection. Red & Black are hot. White is neutral, and green is ground. You existing panel is wired with 3 wires. Black & Red are hot and green is ground. There is no neutral wire. Connect the black to black, red to red, and then connect the white and ground together at the plug.