Skip Nav Bill’s Quality Electric, LLC shares electrical information about those protective AFCIs with a focused explanation of what they are, when they are required, what an arc is and what circumstances may initiate one such as extension cords, appliance cords and loose connections that you want to avoid. Stay Electrically Safe and IN THE KNOW as a homeowner! Special Thanks to Nachi.org and to Nick Gromicko and Kenton Shepard for the article on Arc Fault Circuit Interrupters. 