20 Amp NEMA L1520 Single Receptacle, L1520R, Turnlok Single Receptacle 4wire 20amp 3phase 250v, • Compact, impact-resistant nylon face and body are ultrasonically welded together for unrivaled strength. , • Face color coding by voltage facilitates locating and mating of proper devices. , • One piece, high-grade brass contacts offer excellent conductivity and heat-rise resistance. , • Clearly marked NEMA configuration, rating, and third-party listing on each unit s face. , • Single-piece, solid brass mounting strap is free of easily loosened rivets found on other brands. , • Side and external screw-pressure-plate back wire capability. , • Accepts #14 - #10 AWG.