Nec Cable Ampacity: adjustment_conductor_fill
NEC (NFPA 70) cable ampacity ratings — allowable current for copper and aluminum conductors at 60/75/90°C insulation ratings
| conductor material | conductor size | adjustment factor pct | conductor count min | nec table | notes |
|---|---|---|---|---|---|
| adjustment_conductor_fill | 10 | 0.5 | 10 | 310.15(C)(1) | Ampacity adjustment for 10-20 current-carrying conductors in raceway/cable/earth; SK=lower bound of count range |
| adjustment_conductor_fill | 21 | 0.45 | 21 | 310.15(C)(1) | Ampacity adjustment for 21-30 current-carrying conductors in raceway/cable/earth; SK=lower bound of count range |
| adjustment_conductor_fill | 31 | 0.4 | 31 | 310.15(C)(1) | Ampacity adjustment for 31-40 current-carrying conductors in raceway/cable/earth; SK=lower bound of count range |
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