Nec Cable Ampacity: aluminum
310.15B17#1250 kcmil to 310.15B17#300 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 | 310.15B17#1250 kcmil | 710 | 855 | 965 | free air | 310.15(B)(17) | NEC (NFPA 70) 2017 Edition Table 310.15(B)(17) |
| aluminum | 310.15B17#1500 kcmil | 795 | 950 | 1,070 | free air | 310.15(B)(17) | NEC (NFPA 70) 2017 Edition Table 310.15(B)(17) |
| aluminum | 310.15B17#1750 kcmil | 875 | 1,050 | 1,185 | free air | 310.15(B)(17) | NEC (NFPA 70) 2017 Edition Table 310.15(B)(17) |
| aluminum | 310.15B17#2 AWG | 110 | 135 | 150 | free air | 310.15(B)(17) | NEC (NFPA 70) 2017 Edition Table 310.15(B)(17) |
| aluminum | 310.15B17#2/0 AWG | 175 | 210 | 235 | free air | 310.15(B)(17) | NEC (NFPA 70) 2017 Edition Table 310.15(B)(17) |
| aluminum | 310.15B17#2000 kcmil | 960 | 1,150 | 1,295 | free air | 310.15(B)(17) | NEC (NFPA 70) 2017 Edition Table 310.15(B)(17) |
| aluminum | 310.15B17#250 kcmil | 265 | 315 | 355 | free air | 310.15(B)(17) | NEC (NFPA 70) 2017 Edition Table 310.15(B)(17) |
| aluminum | 310.15B17#3 AWG | 95 | 115 | 130 | free air | 310.15(B)(17) | NEC (NFPA 70) 2017 Edition Table 310.15(B)(17) |
| aluminum | 310.15B17#3/0 AWG | 200 | 240 | 270 | free air | 310.15(B)(17) | NEC (NFPA 70) 2017 Edition Table 310.15(B)(17) |
| aluminum | 310.15B17#300 kcmil | 290 | 350 | 395 | free air | 310.15(B)(17) | NEC (NFPA 70) 2017 Edition Table 310.15(B)(17) |
What else is in Engineering Database
AI built for engineering. Searches the engineering database, performs calculations, gives source-backed engineering insights.
Get started for free ↗Reference Data375 engineering tablesMaterial properties, pipe and shape dimensions, code tables, and electrical ratings across mechanical, civil, chemical, electrical, materials, and manufacturing engineering.
Browse dataCalculatorsDeterministic engineering calculatorsSizing, checking, and conversion tools that run against the reference tables. Inputs are code-compliant, outputs are traceable to the source standard.
Browse calculators