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Three Phase Motor Power Cable Voltage Rating

Anirood Hasseea

Power Supply - 3 Phase 400V

As per BS 7671, is it acceptable to use 4 cores (Br Bl Gy & Yellow) 300/500V cable be used for 3-phase motors?

What is the recommended voltage rating of power cables for three-phase motors?

Thanking you in advance.

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  • Though I might add that voltage rating isn't the only consideration - things like physical robustness may be needed for some environments, which usually implies a "chunkier" cables - which often naturally come with a higher voltage rating due to the thicker layers of insulation and sheath.

       - Andy.

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  • Though I might add that voltage rating isn't the only consideration - things like physical robustness may be needed for some environments, which usually implies a "chunkier" cables - which often naturally come with a higher voltage rating due to the thicker layers of insulation and sheath.

       - Andy.

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