Tamper resistant GFCI receptacles provide compliance with 2011 NEC article 406.12 that states that all receptacles installed in dwelling units must be tamper resistant. Durable impact resistant thermoplastic face and back body is virtually unbreakable. TR in designation provides visual identification. Terminal screws are backed out and ready to wire. Extra long and extra wide mounting straps with patented built-in wire stripper for #14 and #12 wire to speed installation. Side wire terminals accept up to #10 solid or stranded wire and push-in terminals accept #14 solid wire.