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Application – Three-Phase Motors
Continued on page 20
75 °C
MOTOR RATING 75 °C INSULATION - AWG COPPER WIRE SIZE MCM COPPER WIRE SIZE
VOLTSHPKW1412108643210000000000 250 300 350 400 500
200 V
60 Hz
Three-
Phase
3 - Lead
1/2 0.37
710 1140 1800 2840 4420
3/4 0.55
510 810 1280 2030 3160
1 0.75
430 690 1080 1710 2670 4140 5140
1.5 1.1
310 500 790 1260 1960 3050 3780
2 1.5
240 390 610 970 1520 2360 2940 3610 4430 5420
3 2.2
180 290 470 740 1160 1810 2250 2760 3390 4130
5 3.7
110
170 280 440 690 1080 1350 1660 2040 2490 3050 3670 4440 5030
7.5 5.5
0 0 200 310 490 770 960 1180 1450 1770 2170 2600 3150 3560
10 7.5
00
150
230 370 570 720 880 1090 1330 1640 1970 2390 2720 3100 3480 3800 4420
15 11
000
160
250 390 490 600 740 910 1110 1340 1630 1850 2100 2350 2570 2980
20 15
0000
190
300 380 460 570 700 860 1050 1270 1440 1650 1850 2020 2360
25 18.5
00000
240
300 370 460 570 700 840 1030 1170 1330 1500 1640 1900
30 22
00000
200 250
310 380 470 580 700 850 970 1110 1250 1360 1590
230 V
60 Hz
Three-
Phase
3 - Lead
1/2 0.37
930 1490 2350 3700 5760 8910
3/4 0.55
670 1080 1700 2580 4190 6490 8060 9860
1 0.75
560 910 1430 2260 3520 5460 6780 8290
1.5 1.1
420 670 1060 1670 2610 4050 5030 6160 7530 9170
2 1.5
320 510 810 1280 2010 3130 3890 4770 5860 7170 8780
3 2.2
240 390 620 990 1540 2400 2980 3660 4480 5470 6690 8020 9680
5 3.7
140
230 370 590 920 1430 1790 2190 2690 3290 4030 4850 5870 6650 7560 8460 9220
7.5 5.5
0
160
260 420 650 1020 1270 1560 1920 2340 2870 3440 4160 4710 5340 5970 6500 7510
10 7.5
00
190
310 490 760 950 1170 1440 1760 2160 2610 3160 3590 4100 4600 5020 5840
15 11
000
210
330 520 650 800 980 1200 1470 1780 2150 2440 2780 3110 3400 3940
20 15
000
160 250
400 500 610 760 930 1140 1380 1680 1910 2180 2450 2680 3120
25 18.5
0000
200
320 400 500 610 750 920 1120 1360 1540 1760 1980 2160 2520
30 22
00000
260
330 410 510 620 760 930 1130 1280 1470 1650 1800 2110
380 V
60 Hz
Three-
Phase
3 - Lead
1/2 0.37
2690 4290 6730
3/4 0.55
2000 3190 5010 7860
1 0.75
1620 2580 4060 6390 9980
1.5 1.1
1230 1970 3100 4890 7630
2 1.5
870 1390 2180 3450 5400 8380
3 2.2
680 1090 1710 2690 4200 6500 8020 9830
5 3.7
400 640 1010 1590 2490 3870 4780 5870 7230 8830
7.5 5.5
270 440 690 1090 1710 2640 3260 4000 4930 6010 7290 8780
10 7.5
200
320 510 800 1250 1930 2380 2910 3570 4330 5230 6260 7390 8280 9340
15 11
0 0 370 590 920 1430 1770 2170 2690 3290 4000 4840 5770 6520 7430 8250 8990
20 15
00
280
440 700 1090 1350 1670 2060 2530 3090 3760 4500 5110 2840 6510 7120 8190
25 18.5
000
360
570 880 1100 1350 1670 2050 2510 3040 3640 4130 4720 5250 5740 6590
30 22
000
290
470 730 910 1120 1380 1700 2080 2520 3020 3430 3920 4360 4770 5490
40 30
00000
530
660 820 1010 1240 1520 1840 2200 2500 2850 3170 3470 3990
50 37
00000
440 540
660 820 1000 1220 1480 1770 2010 2290 2550 2780 3190
60 45
00000
370 460 560
690 850 1030 1250 1500 1700 1940 2150 2350 2700
75 55
0000000
460 570
700 860 1050 1270 1440 1660 1850 2030 2350
100 75
00000000
420 510 630
760 910 1030 1180 1310 1430 1650
125 90
0000000000
510 620 740
840 950 1060 1160 1330
150 110
00000000000
520 620 700 790
880 960 1090
175 130
000000000000
560 650 750 840
920 1070
200 150
0000000000000
550 630 700 760
880
Lengths in BOLD only meet the US National Electrical Code ampacity requirements for individual conductors in free air
or water. Lengths NOT in bold meet NEC ampacity requirements for either individual conductors or jacketed cable. See
page 11 for additional details.
Table 19 Three-Phase 75 °C Cable, 60 Hz (Service Entrance to Motor) Maximum Length in Feet
19