Nec Cable Ampacity: copper hightemp raceway
310.15B18#4/0 AWG to 310.15B18#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 raceway | 310.15B18#4/0 AWG | 332 | 346 | 361 | raceway or cable | 310.15(B)(18) | NEC (NFPA 70) 2017 Edition Table 310.15(B)(18) |
| copper hightemp raceway | 310.15B18#6 AWG | 96 | 110 | 117 | raceway or cable | 310.15(B)(18) | NEC (NFPA 70) 2017 Edition Table 310.15(B)(18) |
| copper hightemp raceway | 310.15B18#8 AWG | 76 | 83 | 93 | raceway or cable | 310.15(B)(18) | NEC (NFPA 70) 2017 Edition Table 310.15(B)(18) |
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