From tiny hysteresis motors that drive electric clocks to huge synchronous motors that develop more than 50,000 hp, the alternating current (AC) motor has become an indispensable part of everyday life ...

Article 430, the largest Article in the NEC, is commonly understood to be the “motor” Article. But if motors are a part of air-conditioning (A/C) and refrigeration equipment, they also fall under Art.

It's essential to understand how power and energy calculations relate, especially with the increased importance of energy efficiency. Calculations of power and energy are relatively straightforward ...