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It depends in which country you live, as the colours depend upon national or international standards. In the UK, for example, the colours were red, yellow, and blue. These days, in order to integrate with EU requirements, those colours are being replaced with brown, black and grey.

In Canada the phase colours are Red, Black and Blue.

In the US the phase color coding is Black, Red and Blue for 208 volts and Brown, Orange and Yellow for 480 volts.

See related links below.

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Wiki User

11y ago
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Wiki User

15y ago

In the US: A phase - brown B phase - orange C phase - yellow neutral - gray ground - green or green with a yellow stripe. Note that the ground color is the only one mandated by code. The others are simply industry standard usage.

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12y ago

In the US and Canada (and probably elsewhere) neutral is always white or grey. In the EU, neutral is always blue. It does not matter if you are talking one phase, split phase, or three phase. Legacy wiring in the UK, prior to 2006, has neutral as black.

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11y ago

In accordance with EU harmonisation requirements, the colours for three-phase line conductors are brown, black, and grey, with a blue neutral. Utility companies who have yet to adopt these colours use red, yellow, and blue for the line conductors.

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Wiki User

11y ago

green is ground (THE LAW)

white is neutral (THE LAW)

any other colors are permitted for the phase conductors

standard practice uses brown/black/orange 480/277

120/208

black/ red /blue

machine control voltage JIC convention

220 or 480 black

120v red

24v blue

white neutral(still THE LAW)

green ground

DIN Europe have a bit different grounding (earthing) convention

green with yellow traces is what we call grounding electrode conductor

usa is usually solid bare copper

the green is separate to the same common but never looped or chained

( ground loops are a problem with low voltage electronics )

Answer

Although 480 V isn't a standard voltage in Europe, the colours used to identify the line, neutral, and earth conductors are as follows:

  • line conductors: brown/black/grey
  • neutral conductor: blue
  • earth conductor: green/yellow stripe (often bare in residential circuits)
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Wiki User

11y ago

The color code for 3phase 240 volts is PHASE A- BLACK PHASE B- RED PHASE C- BLUE

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Wiki User

10y ago

The UK standard is brown=live, blue=neutral, green/yellow stripes=earth.

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Wiki User

13y ago

red, yellow & blue

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Kenneth Parmer

Lvl 2
1y ago

Black red blue

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Q: What are standard wire colors for 240 volts?
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The three colours used in the UK are: blue (live), brown (neutral), yellow and green stripes (earth). The standard UK domestic voltage is 240 volts.


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