Electrical Exam Term
Watt
The standard unit of electrical power, equal to one volt times one ampere (P = V × I).
Detailed Explanation
Watts measure the rate of energy consumption or production. A 100-watt light bulb uses 100 watts of power when operating. The NEC uses volt-amperes (VA) for load calculations, which equals watts when the power factor is 1.0. Common power relationships: 1 horsepower = 746 watts, and 1 kilowatt = 1,000 watts. Understanding watts is essential for sizing circuits, calculating loads, and determining electrical costs.
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