310.16: Conductor Ampacities

Source: NEC 2020

Allowable ampacities of insulated conductors rated up to and including 2000 volts, 60°C through 90°C, not more than three current-carrying conductors in raceway, cable, or earth.

Size (AWG/kcmil)Copper 60°C (TW)Copper 75°C (THWN)Copper 90°C (THHN)Alum 60°CAlum 75°CAlum 90°C
14152025---
12202530152025
10303540253035
8405055304045
6556575405060
4708595556575
385100110657585
2951151307590100
111013015085100115
1/0125150170100120135
2/0145175195115135150
3/0165200225130155175
4/0195230260150180205

Professional Usage Disclaimer

This data is provided for informational purposes only. Always verify with the latest edition of the National Electrical Code (NFPA 70) and consult with a licensed electrical professional or AHJ (Authority Having Jurisdiction) before performing any electrical work. Zing² is a reference tool, not a substitute for qualified engineering.