Electrical Exam Term
Circuit Breaker
An automatically operated electrical switch designed to protect a circuit from damage caused by overcurrent, overload, or short circuit.
Detailed Explanation
Circuit breakers can be reset after tripping, unlike fuses which must be replaced. They are rated by voltage, current, and interrupting capacity. Types include standard thermal-magnetic breakers, GFCI breakers, AFCI breakers, and dual-function (AFCI/GFCI) breakers. The NEC requires breakers to be accessible and properly labeled in the panelboard.
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Practice QuestionEasy
Which of the following best describes the concept of Circuit Breaker?
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