Can AFCI outlets be used on the two wire circuits found in older homes? June 11, 2021 17:01 Updated Follow Yes, AFCI outlets can be used in older homes that contain two wire circuits. Related articles How many outlets are protected downstream from an AFCI outlet? Will an AFCI protect what I have plugged into the outlet? Are Leviton AFCI outlets UL listed? Are AFCI outlets required by the electric code? Video - GFCI Circuit Breakers vs Outlets…What’s the Difference?