Trane Starters Engineering Bulletin page 58

Electrical System–Power Wire Sizing
Table 11. MCA look-up table for 75°C copper conductors rated for 0–2,000 Volts
Note: Use this table to select supply leads for all starters, and motor leads for remote-mounted across-the-
line, primary reactor, autotransformer, and Adaptive Frequency Drives. Value in table must be larger
than the MCA to use the wire combination.
1 Conduit
Wire Size 3 Wires
8 50
6 65
4 85
3 100
2 115
1 130
0 150
00 175
000 200
0000 230
250 255
300 285
350 310
400 335
500 380
600 420
(a) Based on 2011 NEC Table 310.15(B)(16)
Table 12. MCA look-up table for 75°C copper conductors rated for 0–2,000 Volts
Note: Use this table to select motor leads for remote-mounted wye-delta and solid-
state starters (inside-the-delta designs only).Value in table must be larger
than the MCA to use the wire combination.
1 Conduit
Wire Size 6 Wires
8 69
6 89
4 117
3 137
2 158
1 179
0 206
00 241
000 275
0000 317
250 351
300 393
350 427
400 462
500 524
600 579
(a) Based on 2011 NEC Table 310.15(B)(16)
58
1 Conduit 2 Conduits
6 Wires 3 Wires ea.
240 300
280 350
320 400
368 460
408 510
456 570
496 620
536 670
608 760
672 840
2 Conduits 2 Conduits
3 Wires ea. 6 Wires ea.
86
112
146
172
198
224
258 413
301 482
344 551
396 634
439 703
491 786
534 855
577 924
655 1048
724 1158
3 Conduits 2 Conduits
3 Wires ea. 6 Wires ea.
450 480
525 560
600 640
690 736
765 816
855 912
930 992
1005 1072
1140 1216
1260 1344
4 Conduits 3 Conduits
3 Wires ea. 6 Wires ea.
517 620
603 724
689 827
793 951
879 1055
982 1179
1069 1282
1155 1386
1310 1572
1448 1737
(a)
4 Conduits 5 Conduits
3 Wires ea. 3 Wires ea.
600 750
700 875
800 1000
920 1150
1020 1275
1140 1425
1240 1550
1340 1675
1520 1900
1680 2100
(a)
6 Conduits
3 Wires ea.
775
905
1034
1189
1319
1474
1603
1732
1965
2172
6 Conduits
3 Wires ea.
900
1050
1200
1380
1530
1710
1860
2010
2280
2520
CTV-PRB004-EN