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Arc-fault circuit interrupter (AFCI)

A circuit protection device required by NFPA 70 (US NEC) in specified residential circuits, designed to detect the signature current waveform of series arcing in degraded wiring and interrupt the circuit before ignition-level heat is generated.

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Related terms

Conveyor belt slip fireFrank-Kamenetskii modelGlowing connectionGround currentLithium-ion thermal runawayNFPA 51BReduced ignition propensity (RIP)Side flashSmouldering combustion

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