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Appendix
1/0 | 125 | 150 | 170 | 100 | 120 | 135 | 1/0 |
2/0 | 145 | 175 | 195 | 115 | 135 | 150 | 2/0 |
3/0 | 165 | 200 | 225 | 130 | 155 | 175 | 3/0 |
4/0 | 195 | 230 | 260 | 150 | 180 | 205 | 4/0 |
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250 | 215 | 255 | 290 | 170 | 205 | 230 | 250 |
300 | 240 | 285 | 320 | 190 | 230 | 255 | 300 |
350 | 260 | 310 | 350 | 210 | 250 | 280 | 350 |
400 | 280 | 335 | 380 | 225 | 270 | 305 | 400 |
500 | 320 | 380 | 430 | 260 | 310 | 350 | 500 |
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600 | 355 | 420 | 475 | 285 | 340 | 385 | 600 |
700 | 385 | 460 | 520 | 310 | 375 | 420 | 700 |
750 | 400 | 475 | 535 | 320 | 385 | 435 | 750 |
800 | 410 | 490 | 555 | 330 | 395 | 450 | 800 |
900 | 435 | 520 | 585 | 355 | 425 | 480 | 900 |
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1000 | 455 | 545 | 615 | 375 | 445 | 500 | 1000 |
1250 | 495 | 590 | 665 | 405 | 485 | 545 | 1250 |
1500 | 520 | 625 | 705 | 435 | 520 | 585 | 1500 |
1750 | 545 | 650 | 735 | 455 | 545 | 615 | 1750 |
2000 | 560 | 665 | 750 | 470 | 560 | 630 | 2000 |
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CORRECTION FACTORS
Ambi- | For ambient temperatures other than 30°C (86°F), multiply the allowable | Ambient | |||||
ent | ampacities shown above by the appropriate factor shown below. | Temp. | |||||
Temp. |
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(°C) |
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1.08 | 1.05 | 1.04 | 1.08 | 1.05 | 1.04 | ||
1.00 | 1.00 | 1.00 | 1.00 | 1.00 | 1.00 | ||
0.91 | 0.94 | 0.96 | 0.91 | 0.94 | 0.96 | ||
0.82 | 0.88 | 0.91 | 0.82 | 0.88 | 0.91 | ||
0.71 | 0.82 | 0.87 | 0.71 | 0.82 | 0.87 | ||
0.58 | 0.75 | 0.82 | 0.58 | 0.75 | 0.82 | ||
0.41 | 0.67 | 0.76 | 0.41 | 0.67 | 0.76 | ||
– | 0.58 | 0.71 | – | 0.58 | 0.71 | ||
– | 0.33 | 0.58 | – | 0.33 | 0.58 | ||
– | – | 0.41 | – | - | 0.41 | ||
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1)Reprinted with permisson of NFPA 70 - 1999, National Electrical Code ®, copyright © 2000. This reprinted material is not the complete and official position of the NFPA on the referenced subject, which is represented only by the standard in its entirety.
78 | Installation Guide APC Silcon |