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 Gage (AWG) | ||||||
| Transformer | Distance from Motor to Transformer (feet) | |||||
| hp | kVA | 100 | 150 | 200 | 300 | 500 |
| 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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