Cooper Wiring Devices 1877V Ivory Single Receptacle Outlet 20A-125V 2 Pole 3 Wire Grounded, specially designed as a commercial grade Gfci Receptacle that's NOM 426, ANCE, CSA, and UL listed. The triple wire line contacts provide excellent long-term plug retention, and it has an arc-resistant thermostat face. The side wire terminals accept up to #10 solid or stranded wire. The terminal screws are backed out, and the tamper resistant receptacles have a UL Listed shutter system.