What color is the neutral on a three phase four wire system?

Answer 1

In North America, the neutral wire is usually white; hot wires will be red or black; ground wires will be green. But it is not always the same; if you are working with three-phase power, or in applications where you have a lot of different wires, color codes can get lost.

In USA, Canada and other countries using a similar 60 Hz system:

• the Neutral wire is colored White or Commercial Gray
• the Ground wire is colored Green or is bare wire

In Europe and other world areas using a similar 50 Hz system:

• the Neutral wire is colored Blue

• the Earth wire is colored Green and Yellow

Answer 2

The neutral wire color is white in USA, Canada and other countries which run a 60 Hz electrical power service.

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The neutral wire color is blue in countries in Europe and elsewhere which run a 50 Hz electrical power service.

WARNING: It is never ever safe to assume that the color of any wire means that it cannot be "hot" or live".

Do not assume you know which wire is which until you have actually tested it with a proper electrician's test meter or other approved electrical voltage testing device!

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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.

Answer 3

Answer for USA, Canada and countries running a 60 Hertz supply service.White is the colour used for neutrals in any three phase four wire system. White is also used to identify the neutral in single phase electrical systems. Where the wire size is larger and the wire does have a white colour insulation, the code states that the wire must be identified with an identifier. This is usually a white colour tape that is applied on the neutral conductor for a length of 100 mm (4").

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BLACK is generally the standard colour used to denote the neutral in a three phase four wire colour system.

For European Systems

The present standard colour for the neutral is blue. The line colours are brown, black, and grey. The earth wiring colour is green/yellow stripe.

Answer 4

Most of the time, a three wire set will have a red, which is hot, a black, which is your ground wire, and the third wire will be your neutral.

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In the US the neutral is most commonly white. It can be gray.

Answer 5

in 480 the neutural is grey. in all other it is most often white In Canada the neutral colour is white in both 3 phase and single phase.

Answer 6

White