Wire Sizing Calculator

Determine proper wire gauge based on ampacity, length, and temperature rating per NEC Article 310

NEC 2023 Article 310NEC 2023 Table 310.16

Load Current

System Voltage

Conductor Material

Insulation Type

Ambient Temperature

Common: 30°C (86°F) or 40°C (104°F)

Number of Current-Carrying Conductors

Excludes equipment grounding conductors

Enter values and click Calculate to see results.

Enter values and click Calculate

Frequently Asked Questions