Leviton GFTR1-IGO 15A-125V Extra-Heavy Duty Industrial Grade Isolated Ground Duplex Tamper-Resistant Self-Test GFCI Receptacle, Orange, 15-Amp Wraparound Steel strap provides superior structural Integrity, especially in hard-use environments Dual function status indicator light provides simple, intuitive feedback on power and protection status as well as correct wiring Line terminal clamps initially held open to expedite first time wiring Back & side wire (external back wire clamps) Isolated ground receptacles isolate the strap/ground Lead to reduce electrical noise interference to sensitive electronic equipment