Nec Cable Ampacity: aluminum
310.17#400 kcmil to 350 kcmil
NEC (NFPA 70) cable ampacity ratings — allowable current for copper and aluminum conductors at 60/75/90°C insulation ratings in raceways and free air; high-temperature conductor ampacity at 150/200/250°C; ambient temperature correction factors; conductor fill adjustment factors
| conductor material | conductor size | ampacity 60C (A) | ampacity 75C (A) | ampacity 90C (A) | installation | nec table | standard |
|---|---|---|---|---|---|---|---|
| aluminum | 310.17#400 kcmil | 355 | 425 | 480 | free air | 310.17 | NEC (NFPA 70) Table 310.17 |
| aluminum | 310.17#500 kcmil | 405 | 485 | 545 | free air | 310.17 | NEC (NFPA 70) Table 310.17 |
| aluminum | 310.17#6 AWG | 60 | 75 | 80 | free air | 310.17 | NEC (NFPA 70) Table 310.17 |
| aluminum | 310.17#600 kcmil | 455 | 540 | 615 | free air | 310.17 | NEC (NFPA 70) Table 310.17 |
| aluminum | 310.17#700 kcmil | 500 | 595 | 675 | free air | 310.17 | NEC (NFPA 70) Table 310.17 |
| aluminum | 310.17#750 kcmil | 515 | 620 | 700 | free air | 310.17 | NEC (NFPA 70) Table 310.17 |
| aluminum | 310.17#8 AWG | 45 | 55 | 60 | free air | 310.17 | NEC (NFPA 70) Table 310.17 |
| aluminum | 310.17#800 kcmil | 535 | 645 | 725 | free air | 310.17 | NEC (NFPA 70) Table 310.17 |
| aluminum | 310.17#900 kcmil | 580 | 700 | 785 | free air | 310.17 | NEC (NFPA 70) Table 310.17 |
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