Nec Cable Ampacity: copper hightemp freeair
310.15B19#4/0 AWG to 310.15B19#8 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 150C type Z (A) | ampacity 200C types FEP FEPB PFA SA (A) | ampacity 250C types PFAH TFE (A) | installation | nec table | standard |
|---|---|---|---|---|---|---|---|
| copper hightemp freeair | 310.15B19#4/0 AWG | 529 | 629 | 830 | free air | 310.15(B)(19) | NEC (NFPA 70) 2017 Edition Table 310.15(B)(19) |
| copper hightemp freeair | 310.15B19#6 AWG | 155 | 165 | 205 | free air | 310.15(B)(19) | NEC (NFPA 70) 2017 Edition Table 310.15(B)(19) |
| copper hightemp freeair | 310.15B19#8 AWG | 106 | 124 | 142 | free air | 310.15(B)(19) | NEC (NFPA 70) 2017 Edition Table 310.15(B)(19) |
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