Starting with Part III of Article 220, which is titled Feeder and Service Load Calculation, we will finally start with the actual math work.

Single-phase and three-phase AC squirrel cage induction motors need some type of circuit to initiate a start or stop function. Usually single-phase motors and smaller horsepower three-phase motors can be started with full voltage across the line. However, larger horsepower three-phase motors require reduced voltage starting techniques.

Let's emphasize your need to work towards safety and to implement what you have learned in your jobs and your lives; it will also help you see how you can get more involved and make an even better and safer electrical industry.