Rhode Island Electrical License Practice Test

Question: 1 / 400

What is the function of a circuit breaker?

To control light fixtures

To protect electrical circuits from overloads and short circuits

The function of a circuit breaker is to protect electrical circuits from overloads and short circuits. When a circuit experiences too much current—whether due to a fault in the wiring, a malfunctioning device, or an overload—the circuit breaker acts as a safety device that interrupts the flow of electricity. This interruption prevents potential damage to wiring and appliances, as well as reduces the risk of electrical fires that could arise from overheating conductors.

In essence, the circuit breaker is a critical component of electrical safety systems. It ensures that circuits operate within their safe limits by automatically shutting off the power when necessary, thus protecting both property and personal safety. This function is essential in maintaining the integrity of electrical systems, avoiding hazardous situations that can arise from excessive current.

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To regulate voltage

To enhance energy efficiency

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