Calculate wire ampacity with multiple NEC derating factors for solar installations including conduit, rooftop, and continuous load.
Input Parameters
Results
--
Base Ampacity (90C)
A
--
Temp Derate Factor
--
Fill Derate Factor
--
Final Ampacity
A
Note: Always use 90C column for derating, then compare to termination temperature rating. Most equipment terminals are rated 75C.
Reference
Base Ampacity from NEC Table 310.16
Temp Factor = sqrt((Rated - Ambient) / (Rated - 30))
Fill Factor per NEC Table 310.15(C)(1)
Final Ampacity = Base x Temp Factor x Fill Factor