IBEW Electrical Practice Test 2025 – Complete Exam Preparation

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Which device monitors and interrupts power in case of an arc fault?

Ground Fault Circuit Interrupter (GFCI)

Arc Fault Circuit Interrupter (AFCI)

The Arc Fault Circuit Interrupter (AFCI) is specifically designed to detect and interrupt arc faults, which are unintended arcs that can occur in electrical wiring and devices, creating potential fire hazards. The AFCI monitors the electrical circuit for unique patterns of current that indicate an arc condition. When it detects such a fault, it rapidly shuts off power to prevent any further electrical arcing, which significantly reduces the risk of fire caused by arcing conditions.

Understanding the function of AFCIs is essential, especially in residential and commercial installations, where their application can markedly enhance electrical safety. This technology contributes to the prevention of fires that could result from deteriorating wires or loose connections, emphasizing the importance of including AFCIs in modern electrical systems.

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Circuit Breaker

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