Electric Motors - 230 & 460V Three Phase Circuits Wiring | MEPKit Engineering Tools

Transformer (HP)	Voltage (V)	Apparent Power (kVA)	100 ft	150 ft	200 ft	300 ft	500 ft
1.5	230	3	12	12	12	12	10
2	460	3	12	12	12	12	12
3	230	3	12	12	12	10	8
2	460	3	12	12	12	12	12
3	230	5	12	10	10	8	6
3	460	5	12	12	12	12	10
5	230	7.5	10	8	8	6	4
5	460	7.5	12	12	12	10	8
7.5	230	10	8	6	6	4	2
7.5	460	10	12	12	12	10	8
10	230	15	6	4	4	4	1
10	460	15	12	12	12	10	8
15	230	20	4	4	4	2	0
15	460	20	12	10	10	8	6
20	230	See note	4	2	2	1	0
20	460	See note	10	8	8	6	4
25	230	See note	2	2	2	0	0
30	230	See note	2	1	1	0	0
30	460	See note	8	6	6	4	2
40	230	See note	1	0	0	0	0
50	230	See note	1	0	0	0	0
50	460	See note	4	4	2	2	0
60	460	See note	4	2	2	0	0
75	230	See note	0	0	0	0	0
75	460	See note	4	2	2	0	0

Transformer (HP)

Voltage (V)

Apparent Power (kVA)

100 ft

150 ft

200 ft

300 ft

500 ft

1.5

230

460

230

460

230

460

230

7.5

460

7.5

230

7.5

460

230

460

230

460

230

See note

460

See note

230

See note

230

See note

460

See note

230

See note

230

See note

460

See note

460

See note

230

See note

460

See note

Notes

All wiring and electrical connections should comply with the National Electrical Code (NEC) and with local codes and practices.
Apparent Power: 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.
For rows marked 'See note': The local power company should be consulted.
If undersized wire is used between the motor and the power source, the starting and load carrying capabilities of the motor will be limited.

Conversion Factors

1 hp = 0.746 kW
1 ft (foot) = 0.3048 m

Wire Gauge (AWG) Reference

The table above provides recommended copper wire gauges (American Wire Gauge) based on motor horsepower, operating voltage (230V or 460V three-phase), apparent power in kVA, and distance from motor to transformer in feet. Lower AWG numbers indicate larger diameter wires.