What I wonder is there anyone keeping records to see if AFCI protection really works. When there is a small fire from an extension cord is there a report submitted that states if the circuit was AFCI protected or not. Most of the homes I work on are old enough not to have required AFCI protection.FWIW, we had installed AFCI on a service changeout a couple years ago. Customer called with complaint of tripping. My help found a damaged extension cord under a chair, lazyboy type IIRC. He did not take pictures. No calls since. Did it trip on SC or AF? IDK. It just worked.
au contraire .....:happyyes:While there is a test for the maximum short-circuit rating, there is no test for a minimum short-circuit rating. In other words, how high of a short-circuit current is required for a miniature circuit breaker to trip instantaneously. Testing showed that minimum short-circuit trip levels are too high, and response time too slow, for a circuit breaker to reliably respond in time to terminate the dangerous sporadic arcing when two conductors touch. Thus began the development of what today is called an arc fault circuit interrupter (AFCI)