Are these installed in your home?
Arc fault circuit interrupter (AFCI) – a circuit breaker that recognizes dangerous conditions not detected by standard circuit breakers and immediately shuts off power to the circuit.
Ground fault circuit interrupter (GFCI) – an outlet that interrupts the flow of electricity when it detects that the current is flowing along an unintended path.
Tamper resistant receptacle (TRR) – an outlet equipped with spring-loaded shutter covers on the outlet openings. Electricity is only allowed to flow when equal pressure is applied simultaneously to both shutters, which occurs when a plug is inserted. Electricity will not flow, for example, when a child inserts an object into only one side of the outlet.