Wire Gauge Selector | Craft Automation

Circuit Parameters

Load Current (A)

One-Way Distance (ft)

Voltage

Phase

Load Type

Max Voltage Drop

▶ Advanced Options

These settings default to the most common values for standard commercial and industrial installations (Copper, THWN 75C, indoor ambient, single circuit). Adjust only if your conditions differ.

Conductor Material

Insulation Rating

Ambient Temperature

Conductors in Same Conduit

Disclaimer: This tool is for general reference and planning purposes only. Results are based on NEC 310 ampacity tables and standard voltage drop formulas, assuming copper conductors, THWN 75C insulation, standard indoor ambient temperature, and a single circuit per conduit unless adjusted in Advanced Options. Always verify final wire sizing with a licensed electrician. Local AHJ requirements may impose additional restrictions.

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⚡ Enter your circuit parameters and press Calculate.