Wire Ampacity Calculator

NEC Table 310.16 with ambient temperature correction (310.15(B)(1)) and conduit fill derating (310.15(C)(1)).

Conductor

Material

Wire Gauge / Size

Insulation Rating

Ambient Temperature

NEC assumes 86°F (30°C) as base ambient. Enter actual site temperature.

Conduit Fill (Current-Carrying Conductors)

Number of current-carrying conductors in conduit

Ampacity Results — NEC 310.16

Base Ampacity (Table 310.16)

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Ambient Temp Correction Factor

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NEC 310.15(B)(1)

Conduit Fill Derating Factor

—

NEC 310.15(C)(1)

Combined Derating

—

TCF × Fill Factor

Final Adjusted Ampacity

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Base × TCF × Fill Factor

Size	60°C (A)	75°C (A)	90°C (A)