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It depends entirely on the electrical standards of the country in which you live. The first answer describes the situation in North America. The European standard is brown-black-grey for residential systems; the UK transmission/distribution system still uses red-yellow-blue, although it will no doubt adopt brown-black-grey to fall into line with European Fourth-Reich requirements. Other countries, such as Australia and New Zealand use yet other colours. And the first answer is where?

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12y ago
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4mo ago

In a three-phase supply system, the color coding for the phases is typically brown, black, and grey. The neutral wire is usually blue, and the ground wire is typically green and yellow striped. It's important to verify the specific color coding standards in your region before working with electrical wiring.

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Q: What is cable colour coding of a three phase supply?
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