Irrigation & Lighting Division

Table 430-150 (From 1999 NEC)

Full-Load Current Three-Phase Alternating-Current Motors

The following values of full-load currents are typical for motors running at speeds usual for belted motors and motors with normal torque characteristics.

Motors built for low speeds (1200 rpm or less) or high torques may require more running current, and multi-speed motors will have full-load current varying with speed. In these cases, the nameplate current rating shall be used.

The voltages listed are rated motor voltages. The currents listed shall be permitted for system voltage ranges of 110 to 120, 220 to 240, 440 to 480, and 550 to 600 volts.

Induction Type Squirrel Cage and Wound Rotor (Amperes)
(Amperes)
Synchronous-Type Unity Power Factor*
Horsepower 115 Volts 200 Volts 208 Volts 230 Volts 460 Volts 575 Volts 2300 Volts 230 Volts 460 Volts
½ 4.4 2.5 2.4 2.2 1.1 0.9 - - -
¾ 6.4 3.7 3.5 3.2 1.6 1.3 - - -
1 8.4 4.8 4.6 4.2 2.1 1.7 - - -
12.0 6.9 6.6 6.0 3.0 2.4 - - -
2 13.6 7.8 7.5 6.8 3.4 2.7 - - -
3 - 11.0 10.6 9.6 4.8 3.9 - - -
5 - 17.5 16.7 15.2 7.6 6.1 - - -
- 25.3 24.2 22 11 9 - - -

10 - 32.2 30.8 28 14 11 - - -
15 - 48.3 46.2 42 21 17 - - -
20 - 62.1 59.4 54 27 22 - - -
25 - 78.2 74.8 68 34 27 - 53 26
30 - 92 88 80 40 32 - 63 32
40 - 120 114 104 52 41 - 83 41

50 - 150 143 130 65 52 - 104 52
60 - 177 169 154 77 62 16 123 61
75 - 221 211 192 96 77 20 155 78
100 - 285 273 248 124 99 26 202 101
125 - 359 343 312 156 125 31 253 126
150 - 414 396 360 180 144 37 302 151
200 - 552 528 480 240 192 49 400 201

250 - - - - 302 242 60 - -
300 - - - - 361 289 72 - -
350 - - - - 414 336 83 - -
400 - - - - 477 382 95 - -
450 - - - - 515 412 103 - -
500 - - - - 590 472 118 - -