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CTV-PRB004-EN 59
Electrical System–Power Wire Sizing
Table 13. MCA look-up table for 90°C copper conductors rated for 0–2,000 Volts
(a)
Wire Size
1 Conduit
3 Wires
1 Conduit
6 Wires
2 Conduits
3 Wires ea.
3 Conduits
3 Wires ea.
2 Conduits
6 Wires ea.
4 Conduits
3 Wires ea.
5 Conduits
3 Wires ea.
6 Conduits
3 Wires ea.
8 55
6 75
4 95
3 115
2 130
1 145
0 170 272 340 510 544 680 850 1020
00 195 312 390 585 624 780 975 1170
000 225 360 450 675 720 900 1125 1350
0000 260 416 520 780 832 1040 1300 1560
250 290 464 580 870 928 1160 1450 1740
300 320 512 640 960 1024 1280 1600 1920
350 350 560 700 1050 1120 1400 1750 2100
400 380 608 760 1140 1216 1520 1900 2280
500 430 688 860 1290 1376 1720 2150 2580
600 475 760 950 1425 1520 1900 2375 2850
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.
(a) , Based on 2011 NEC Table 310.15(B)(16)
Table 14. MCA look-up table for 90°C copper conductors rated for 0–2,000 Volts
(a)
Wire Size
1 Conduit
6 Wires
2 Conduits
3 Wires ea.
2 Conduits
6 Wires ea.
4 Conduits
3 Wires ea.
3 Conduits
6 Wires ea.
6 Conduits
3 Wires ea.
8 75 94
6 103 129
4 131 163
3 158 198
2 179 224
1 200 250
0 234 293 469 586 703 879
00 269 336 537 672 806 1008
000 310 387 620 775 931 1163
0000 358 448 717 896 1075 1344
250 400 500 800 1000 1200 1500
300 441 551 882 1103 1324 1655
350 482 603 965 1206 1448 1810
400 524 655 1048 1310 1572 1965
500 593 741 1186 1482 1779 2224
600 655 819 1310 1637 1965 2456
Note:
Use this table to size motor leads from 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.
(a) Based on 2011 NEC Table 310.15(B)(16)
CTV-PRB004.book Page 59 Sunday, December 18, 2011 6:39 PM