Construction Monkey

Electrical Motor Calculation

Instructions

The Construction Monkey Motor calculator lets you figure out electrical characteristics of your system given a specific motor. By inputting horsepower, motor efficiency, power factor, and system voltage the system will calculate the disconnect size, feeder size, and starter size.

Make your selections below and the form will automatically update the values.

HP
%
Motor
Conductor  
Starter
Conductor
Conductor
Conductor
Conductor
Disconnect
Disconnect

No guarantees are made as to the accuracy of the calculation or compliance with local codes.  Verify all calculations with a professional engineer. If you find an error, or have a suggestion, please send us an email.