Installation Instructions. Install the Arc Fault Circuit Interrupter using the following procedure: 1. Open the Arc Fault Circuit Interrupter by moving its SUIVEZ INSTRUCTIONS. RESET. TESTTEST. AFCI / GFCI. FRONT VIEW. Receptacle. Outlet. LED. Indicator. Light. TEST button: See step 8. RESET button: See step 8. DO NOT install the Outlet Branch Circuit AFCI in an electrical box containing (a) more than four (4) wires (not including the grounding wires) or (b) cables This bulletin contains installation, testing, and removal instructions for the Square D Homeline circuit breaker and Combination Arc Fault Interrupter CAFI. before beginning installation. Failure to do so will risk electrical shock and possible death, personal injury, or property damage. Install the Arc-FaultInstall the Arc-Fault Circuit Breaker using the following procedure: 1. Latch the Arc-Fault Circuit Breaker by moving its handle firmly to the OFF position. 2. Installing a one-pole, 15-amp AFCI (arc-fault-circuit-interrupter) breaker is exactly the same as installing a one-pole GFCI