Tamper Resistant Duplex 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” 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.DESIGN FEATURES:- Tamper Resistant receptacles provide compliance with 2017 NEC Article 406.12 that states that all 15A 125V receptacles installed in dwelling units must be tamper resistant - Excellent plug blade retention provided by 0.031” (0.79mm) brass line contacts - Screw-catch features on duplex devices speeds mounting of wallplates. - Longer, wider strap provides 40% more contact area to wall board, virtually eliminating floating installations - Patented built-in wire stripper for #14 and #12 AWG wire to speed installation - Push-in terminals accept #14 AWG solid wire for quick installation - Patented built-in wire looper for pre-looping - High impact-resistant thermoplastic face and back body eliminates breakage - Double-wipe ground contacts ensure long-term ground retention - Easy access split circuit break-off tab - Tri-combo screws accept Slotted, Phillips, and Robertson-head tools for installation flexibility - Terminal screws backed out and ready for wiring - Side wire terminals accept up to #10 AWG solid wire