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Circuit Wiring - Single Phase (230V) Electrical Motors

Recommended copper wire gage and transformer size for single phase - 230 Volts - electrical motors

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All wiring and electrical connections should comply with the National Electrical Code (NEC) and with local codes and practices.

Wire Gauge (AWG)
TransformerDistance from Motor to Transformer (feet)
hpkVA100150200300500
1.5 3 10 8 8 6 4
2 3 10 8 8 8 4
3 5 8 8 8 4 2
5 7.5 6 4 4 2 0
7.5 10 6 4 3 1 0
  • 1 ft (foot) = 0.3048 m

If undersized wire is used between the motor and the power source the starting and load carrying capabilities of the motor will be limited.

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  • en: electrical motor wire
  • es: cable del motor el├ęctrico
  • de: Elektromotor Draht
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