IAAI Certified Fire Investigator (CFI) Practice Test 2026 – All-in-One Guide to Master Your Certification!

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AFCI stands for Arc-Fault Circuit Interrupter; what does the 'A' represent?

Arc

The A stands for Arc—the electrical discharge that can occur when insulation is damaged or connections are loose. Arcs generate intense heat and can ignite surrounding materials, which is why AFCIs are designed to detect the distinctive electrical signatures of arcing and interrupt the circuit to prevent fires. The other options describe unrelated terms and do not capture the hazard AFCIs target. Arc specifically names the dangerous discharge the device is built to detect and interrupt.

Automatic

Anode

Air