What is AFCI? AFCI stands for arc fault circuit interrupter. It is a safety device which are located in the main panel box to detect arcs. Once it detect an arc, it trips the breaker. Common building practices requires AFCI to be installed in all living areas, bedroom, libraries and family ect. Basically in all room that don’t require GFCI (ground fault circuit interrupter).
The outlet pictured belongs to my little brother. Inspection company had mention that he was missing AFCI in his panel box but he thought nothing of it. I’ve put on my report missing AFCI in panel and didn’t think much of it until now. It not common for this to happen but it happens enough that the International Residential Codes requires that all living areas are protected with AFCI. Arc causes fire, so important to take missing AFCI serious. My brother was lucky and all he had to replace is an outlet.