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Electrical Motors - Single Phase 230 V Circuit Wiring

Copper wire gage and transformer size for single phase 230 volts electrical motors.

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

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

Electrical Motors - Single Phase 230 V Circuit Wiring
Motor Power
(hp)
Transformer
Apparent Power
(kVA)
Wire Gauge (AWG)
Distance from Motor to Transformer (feet)
100150200300500
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

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

Apparent Power is the power supplied to the electric circuit - typical from a power supplier to the grid - to cover the real and reactive power consumption in the loads. 

Related Topics

  • Electrical

    Electrical engineering with units, amps and electrical wiring. Wire gauges, electrical formulas, motors and more.

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