Combination Contactors, Starters, and Pump Control Panels

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Bulletin 512 Non-Reversing Disconnect Type

Full Load Motor Currents

3-Phase Motor Currents

Full Load Currents of 3-Phase, 60 Hertz AC Induction Motors

The full load currents listed below are “average values” for horsepower rated motors of several manufacturers at the more common rated voltages and speeds. These “average values”, along with the similar values listed in the U. S. National Electrical Code (NEC), should be used only as a guide for selecting suitable components for the Motor Branch Circuit. The rated full load current, shown on the motor nameplate, may vary considerably from the listed value depending on the specific motor design.

ATTENTION: The motor nameplate full load current should always be used in determining the rating of the devices used for Motor Running Overcurrent Protection.

HP	RPM⋆	Full Load Current [A]
		208V	240V	480V	600V	2200V	4000V
1/4	3600 1800 1200 900	1.20 1.39 1.62 —	1.04 1.20 1.40 —	0.52 0.60 0.70 —	0.42 0.48 0.56 —	— — — —	— — — —
1/3	3600 1800 1200 900	1.48 1.69 1.89 —	1.28 1.46 1.64 —	0.64 0.73 0.82 —	0.51 0.58 0.66 —	— — — —	— — — —
1/2	3600 1800 1200 900	2.08 2.54 2.89 —	1.80 2.20 2.50 —	0.90 1.10 1.25 —	0.72 0.88 1.00 —	— — — —	— — — —
3/4	3600 1800 1200 900	2.89 3.47 3.81 —	2.50 3.00 3.30 —	1.25 1.50 1.65 —	1.00 1.20 1.32 —	— — — —	— — — —
1	3600 1800 1200 900	3.51 4.25 4.60 —	3.04 3.68 3.98 —	1.52 1.84 1.99 —	1.22 1.47 1.59 —	— — — —	— — — —
1-1/2	3600 1800 1200 900	5.04 5.80 6.49 —	4.36 5.02 5.62 —	2.18 2.51 2.81 —	1.74 2.01 2.25 —	— — — —	— — — —
2	3600 1800 1200 900	6.51 7.18 8.20 —	5.64 6.22 7.10 —	2.82 3.11 3.55 —	2.26 2.49 2.84 —	— — — —	— — — —
3	3600 1800 1200 900	9.24 10.4 11.6 —	8.00 9.04 10.1 —	4.00 4.52 5.04 —	3.20 3.62 4.03 —	— — — —	— — — —
5	3600 1800 1200 900	15.7 15.9 18.6 —	13.6 13.8 16.1 —	6.80 6.88 8.07 —	5.44 5.50 6.46 —	— — — —	— — — —
7-1/2	3600 1800 1200 900	22.1 25.0 26.6 —	19.1 21.7 23.1 —	9.57 10.8 11.5 —	7.66 8.66 9.22 —	— — — —	— — — —
10	3600 1800 1200 900	29.7 31.5 32.9 —	25.7 27.3 28.4 —	12.9 13.7 14.2 —	10.3 10.9 11.4 —	— — — —	— — — —
15	3600 1800 1200 900 600	43.0 46.7 49.1 — —	37.2 40.4 42.5 — —	18.6 20.2 21.3 — —	14.9 16.2 17.0 — —	— — — — —	— — — — —
20	3600 1800 1200 900 600	59.2 59.6 61.7 — —	51.3 51.6 53.4 — —	25.6 25.8 26.7 — —	20.5 20.6 21.4 — —	5.2 5.3 5.4 5.8 6.4	2.9 3.0 3.1 3.2 3.5
25	3600 1800 1200 900 600	70.9 74.7 76.0 — —	61.4 64.7 65.8 — —	30.7 32.3 32.9 — —	24.6 25.9 26.3 — —	6.3 6.5 6.7 6.9 8.1	3.4 3.6 3.7 3.8 4.4
⋆ Synchronous speed nameplate is usually less due to slip.

HP	RPM⋆	Full Load Current [A]
		208V	240V	480V	600V	2200V	4000V
50	3600 1800 1200 900 600	141 144 147 — —	122 125 127 — —	61.2 62.3 63.4 — —	49.0 49.8 50.7 — —	— 12.3 12.4 13.1 14.2	— 6.8 6.8 7.2 7.8
60	3600 1800 1200 900 600	165 172 173 — —	143 149 150 — —	71.6 74.3 74.9 — —	57.3 59.4 59.9 — —	— 14.6 14.9 15.4 16.7	— 8.0 8.2 8.5 9.2
75	3600 1800 1200 900 600	204 211 215 — —	177 183 186 — —	88.5 91.4 93.1 — —	70.8 73.1 74.5 — —	— 18.0 18.2 19.0 21.0	— 9.9 10.0 10.5 11.6
100	3600 1800 1200 900 600 450	267 276 281 — — —	231 239 243 — — —	116 119 122 — — —	92.6 95.5 97.2 — — —	— 23.6 24.2 24.8 26.4 29.8	— 13.0 13.3 13.6 14.5 16.4
125	3600 1800 1200 900 720 600 450	333 340 347 — — — —	288 294 300 — — — —	144 147 150 — — — —	115 118 120 — — — —	— 29.2 29.9 30.9 31.3 32.8 36.0	— 16.1 16.4 17.0 17.2 18.0 19.8
150	3600 1800 1200 900 720 600 450	397 404 414 — — — —	344 350 358 — — — —	172 175 179 — — — —	138 140 143 — — — —	— 34.8 35.5 37.0 37.0 38.8 42.0	— 19.1 19.5 20.4 20.4 21.3 23.1
200	3600 1800 1200 900 720 600 450	524 531 538 — — — —	454 460 466 — — — —	227 230 233 — — — —	182 184 186 — — — —	— 46.7 47.0 49.4 49.0 50.9 53.7	— 25.7 25.9 27.2 27.0 28.0 29.5
250	3600 1800 1200 900 720 600 450 360	642 658 682 — — — — —	556 570 590 — — — — —	278 285 295 — — — — —	222 228 236 — — — — —	— 57.5 58.5 61.5 61.5 61.0 65.3 70.0	— 31.6 32.2 33.8 33.8 33.6 35.9 38.5
300	3600 1800 1200 900 600 450 360	774 790 804 — — — —	670 684 696 — — — —	335 342 348 — — — —	268 274 278 — — — —	— 69.0 70.0 73.5 72.3 76.0 82.8	— 38.0 38.5 40.4 39.8 41.8 45.5
350	3600 1800 1200	— — —	748 762 774	374 381 387	299 305 310	— — —	— — —
400	3600 1800 1200	— — —	874 892 902	437 446 451	350 357 361	— — —	— — —
450	3600 1800 1200	— — —	972 992 1004	486 496 502	389 397 402	— — —	— — —
500	3600 1800 1200	— — —	1074 1096 1108	537 548 554	430 438 443	— — —	— — —