This is Part 6 of a six-part series to help you better understand your home’s electrical system components. You can see the other parts here.
The electrical code requires arc fault circuit interrupters (AFCIs) to be installed on all bedroom electrical circuits. An AFCI looks for a unique arcing condition then turns the circuit it is protecting off. Arcing conditions are often concealed and are almost always a fire hazard. Arc fault circuit breakers are located in your service panel. They will have a unique test button and will be identified as protecting bedroom electrical circuits.