NEC-Electrician: GFCI-vs-AFCI Protection — Flashcards | National Electrical Code (NEC) exam | FatSkills

NEC-Electrician: GFCI-vs-AFCI Protection — Flashcards

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GFCI (Ground-Fault Circuit Interrupter) protects people from shock by detecting small leakage current to ground (milliamps) and tripping fast. AFCI (Arc-Fault Circuit Interrupter) protects against fire by detecting arcing signatures (series/parallel arcs) and tripping when dangerous arcs are detected.

GFCI = shock protection, ground-fault leakage; AFCI = fire protection, arc detection; locations required by code.

Worked example (scenario):
Bathroom receptacle: high shock risk → GFCI required.
Bedroom receptacle circuit: arc/fire risk from damaged cords → AFCI often required (depending on code cycle/area).

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GFCI protection is primarily intended to prevent:
electric shock from ground-fault current
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