Motor FLA & Conductor Size Calculator
Calculate estimated motor full-load current and minimum conductor size using motor power, voltage and phase, or enter a known FLA directly.
Conductor Settings
Ready to Calculate
Enter the motor information to calculate FLA and conductor size.
Important calculation notes
HP/kW mode provides an estimated motor current using motor output power, efficiency and power factor. It is not a replacement for applicable Code-table current or motor nameplate information.
Conductor sizing is based on the selected motor-current multiplier and a built-in reference ampacity list. Correction factors for ambient temperature, conductor bundling, termination temperature, cable type, installation method and other Code requirements are not automatically applied.
The voltage-drop result is an approximate engineering calculation. Actual impedance, raceway arrangement, operating temperature and manufacturer data may affect the result.
This calculator does not determine overload settings, breaker or fuse size, controller rating, disconnect rating, bonding conductor size or short-circuit requirements.