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THREE PHASE MOTOR MAxIMuM CAbLE LENGTH (motor to service entrance) (3)
Motor Rating
Volts
HP
14
.5
710
.75
510
1
430
1.5
310
200 V
60 Hz
2
240
3
180
5
110*
7.5
0
10
0
.5
930
.75
670
1
560
1.5
420
230 V
60 Hz
3
240
5
140*
7.5
0
10
0
.5
3770
.75
2730
1
2300
1.5
1700
460 V
2
1300
60 Hz
3
1000
5
590
7.5
420
10
310
.5
5900
.75
4270
1
3630
1.5
2620
575 V
2
2030
60 Hz
3
1580
5
920
7.5
660
10
490
(3) The portion of the total cable which is between the service entrance and a three phase motor starter should
not exceed 25% of the total maximum length to assure reliable starter operation.
Lengths marked * meet the U.S. National Electrical Code ampacity only for individual conductor 75ºC cable.
Only the lengths without * meet the code for jacketed 75ºC cable. Local code requirements may vary.
12
10
8
1140
1800
2840
810
1280
2030
690
1080
1710
500
790
1260
390
610
970
290
470
740
170
280
440
0
200
310
0
0
230*
1590
2350
3700
1080
1700
2580
910
1430
2260
670
1060
1670
390
620
990
230
370
590
160*
260
420
0
190*
310
6020
9460
4350
6850
3670
5770
9070
2710
4270
6730
2070
3270
5150
1600
2520
3970
950
1500
2360
680
1070
1690
500
790
1250
9410
6810
5800
9120
4180
6580
3250
5110
8060
2530
3980
6270
1480
2330
3680
1060
1680
2650
780
1240
1950
Copper Wire Size (1)
6
4
2
4420
3160
2670
4140
1960
3050
1520
2360
3610
1160
1810
2760
690
1080
1660
490
770
1180
370
570
880
5760
8910
4190
6490
9860
3520
5460
8290
2610
4050
6160
1540
2400
3660
920
1430
2190
650
1020
1560
490
760
1170
8050
6200
3700
5750
2640
4100
6260
1960
3050
4680
5750
4150
3060
4770
0
00
000
5420
4130
2490
3050
3670
1770
2170
2600
1330
1640
1970
9170
5470
6690
8020
3290
4030
4850
2340
2870
3440
1760
2160
2610
7050
0000
4440
3150
2390
9680
5870
4160
3160
17
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