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Answer for USA, Canada and countries running a 60 Hz supply service.

There should be a clarification of what a three wire cable is. A three wire cable consists of three main wires and a bare ground wire. The wire colours are, red, black and white. In normal circumstances the red and black wires are used as "hot" conductors. The white in this cable set is usually used as a neutral.

Two commonly used procedures for a three wire cable in home wiring are for kitchen counter split receptacles and the other is for the traveler cable connection between three way switching. Also in home wiring, larger three wire cables are used for the range and dryer connections.

In larger square foot homes, circuits that are right across the home from the distribution panel are fed with three wire cables. This allows two circuits to be connected to the one cable much like the kitchen counter receptacles.

Now if your definition of a three wire cable includes counting the ground wire, the electrical terminology of this cable is a two wire. In a two wire cable the black conductor is the "hot" wire.

As always, if you are in doubt about what to do, the best advice anyone should give you is to call a licensed electrician to advise what work is needed.

Before you do any work yourself,

on electrical circuits, equipment or appliances,

always use a test meter to ensure the circuit is, in fact, de-energized.

IF YOU ARE NOT ALREADY SURE YOU CAN DO THIS JOB

SAFELY AND COMPETENTLY

REFER THIS WORK TO QUALIFIED PROFESSIONALS.

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12y ago
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15y ago

at least in the USA hot is black.

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14y ago

black

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Q: What color is the hot leg of 12 2 120 volt residential circuit?
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Related questions

What color is the hot wire in a 120 volt circuit?

In the US of A, it's supposed to be black.


How volts comes from a 20amps breaker?

On most residential circuit breaker boxes in North America, each individual breaker represents one 120-volt circuit. Two breakers ganged together represent a 240-volt circuit.


What color of wires are found on a 120 volt duplex poutlet?

A 120 volt duplex outlet is the main type of outlet for residential outlet system. The wires are typically white and black, and there should only be two of them.


What if you plugged in a 110 volt in a 120 volt?

Typically residential voltage may range from 110 to 120 volts so there should be no problem.


Can you use a 125 volt bulb in a 120 volt lamp?

Yes, the voltage listed on the bulb is the nominal voltage and it will work perfectly on a 120 volt circuit.


Can you wire a 120 volt ballast to a 347 volt circuit?

No, not a good idea. You have to use a 347 volt ballast.


What is the Color of neutral wire in 120 volt circuit?

For wiring in the USA the Neutral conductor is required to be white or gray by the National Electrical Code.


Do you need a special plug for a 120 volt 20 amp circuit?

No.


Why won't a 230-460 volt motor work on a 120-208 volt circuit?

Because its designed to operate at 230-460, not 120-208.


Can you use a 130 volt light bulb in a 120 volt socket?

Yes, the 130 volts you read on the bulb is just the maximum it will handle. It will work perfectly in a 120 volt circuit.


Will GFCI work properly if 240 volt split into one 3 wire 120 volt circuit?

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Yes, the 130 volts you read on the bulb is the maximum it will handle. It will work perfectly on a 120 volt circuit and will actually last longer than a standard 120 volt bulb.