Nec Cable Ampacity: correction_ambient_temp
NEC (NFPA 70) cable ampacity ratings — allowable current for copper and aluminum conductors at 60/75/90°C insulation ratings
| conductor material | conductor size | ambient temp C | factor 60C | factor 75C | factor 90C | nec table | notes |
|---|---|---|---|---|---|---|---|
| correction_ambient_temp | 10 | 10 | 1.29 | 1.2 | 1.15 | 310.15(B)(1) | Ambient temp correction factor; base 30C (86F); ambient 10C or less (50F or less) |
| correction_ambient_temp | 13 | 13 | 1.22 | 1.15 | 1.12 | 310.15(B)(1) | Ambient temp correction factor; base 30C; ambient 11-15C (51-59F); SK=midpoint 13C |
| correction_ambient_temp | 18 | 18 | 1.15 | 1.11 | 1.08 | 310.15(B)(1) | Ambient temp correction factor; base 30C; ambient 16-20C (60-68F); SK=midpoint 18C |
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