Wire Ampacity

Adjust base ampacity for ambient heat and how many conductors share the raceway.

Conductor

Wire size

Insulation rating

Ambient temp

°C

Current-carrying conductors

RESULT

65 A

Adjusted ampacity

After ambient + bundle adjustments.

Adjusted ampacity65 A

Base (75°C)65 A

Ambient factor (30°C)1×

Bundle factor (3)1×

For reference only. Not a substitute for a licensed electrician or the adopted code edition and your AHJ. Verify every result before use.