Nec Cable Ampacity: aluminum
310.17#2 AWG to 310.17#4/0 AWG
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#2 AWG | 110 | 135 | 150 | free air | 310.17 | NEC (NFPA 70) Table 310.17 |
| aluminum | 310.17#2/0 AWG | 175 | 210 | 235 | free air | 310.17 | NEC (NFPA 70) Table 310.17 |
| aluminum | 310.17#2000 kcmil | 960 | 1,150 | 1,335 | free air | 310.17 | NEC (NFPA 70) Table 310.17 |
| aluminum | 310.17#250 kcmil | 265 | 315 | 355 | free air | 310.17 | NEC (NFPA 70) Table 310.17 |
| aluminum | 310.17#3 AWG | 95 | 115 | 130 | free air | 310.17 | NEC (NFPA 70) Table 310.17 |
| aluminum | 310.17#3/0 AWG | 200 | 240 | 275 | free air | 310.17 | NEC (NFPA 70) Table 310.17 |
| aluminum | 310.17#300 kcmil | 290 | 350 | 395 | free air | 310.17 | NEC (NFPA 70) Table 310.17 |
| aluminum | 310.17#350 kcmil | 330 | 395 | 445 | free air | 310.17 | NEC (NFPA 70) Table 310.17 |
| aluminum | 310.17#4 AWG | 80 | 100 | 110 | free air | 310.17 | NEC (NFPA 70) Table 310.17 |
| aluminum | 310.17#4/0 AWG | 235 | 280 | 315 | free air | 310.17 | NEC (NFPA 70) Table 310.17 |
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