Motor Circuits: Full-Load Current, Overloads & Breaker Sizing (Chart)
This lesson is part of the course
In this lesson
You calculate the full-load current of six three-phase motors from hp, voltage, efficiency and power factor, set the overloads and the breaker limit with illustrative multipliers, pick standard breaker sizes and chart current against breaker size.
Buy the course once for $9.99 to unlock every lesson and lab, the final exam and the certificate – lifetime access, no subscription.
Lessons in this course
- Ohm's Law & the Power Wheel: Volts, Amps, Ohms & Watts Locked
- Series & Parallel Circuits: Total Resistance, Current & Voltage Drops Locked
- Single- vs Three-Phase Power: √3, Power Factor, kVA & kW Locked
- Dwelling Load Calculation: VA per ft², Demand Factors & Service Size Locked
- Conductor Sizing: Ampacity, Temperature Correction & Bundling Factors Locked
- Voltage Drop: VD = 2·K·I·L ÷ CM and Choosing a Size for 3 % Locked
- Conduit & Box Fill: Percent of Area and Conductor Counts Locked
- Motor Circuits: Full-Load Current, Overloads & Breaker Sizing (Chart) Locked