Wire Size Calculator

Enter the voltage at the source of the circuit. Single-phase voltages are usually 115V or 120V, while three-phase voltages are typically 208V, 230V or 480V.

Voltage:

Amperes:

Phases:

Insulation:

Conductor:

Installation:

Voltage Drop:

Distance:

Result

Wire Size

Voltage at Max Drop

How To Use Wire Size Calculator

Voltage - Enter the voltage at the source of the circuit. Single-phase voltages are usually 115V or 120V, while three-phase voltages are typically 208V, 230V or 480V.
Amperes - Enter the maximum current in amps that will flow through the circuit. For motors, it is recommended to multiply the nameplate FLA by 1.25 for wire sizing.