Eaton���s CL Arc Fault Circuit Interrupter (AFCI) circuit breakers provide protection from fires caused by arcing faults. Arcing faults can occur when insulation around cords, wires or cables is damaged or deteriorated. CL Breakers are classified replacement circuit breakers considered suitable, by underwriter���s laboratories, for use in another manufacturers panel board. These breakers have been tested extensively in numerous GE, Square D, Siemens, Murray Thomas and Betts and Crouse-Hinds panels. AFCIs are required in all 120-Volt, single-phase, 15 and 20 Amp branch circuits supplying outlets installed in dwelling unit family rooms, dining rooms, parlors, living rooms, libraries, dens, bedrooms, sun rooms, closets, recreation rooms, hallways or similar rooms or areas shall be protected by a listed arc fault circuit interrupter, combination-type, installed to provide protection of the branch circuit.