Cooper wiring devices offers the industry's most diverse and complete line of industrial specification grade, marine grade and commercial specification grade locking receptacles, plugs, connectors, flanged inlets and outlets. Our line includes 15 A, 20 A, 30 A, 50 A and 60 A ratings in 2-pole, 2-wire; 2-pole, 3-wire; 3-pole, 3-wire; 3-pole, 4-wire grounding; 4-pole, 4-wire; and 4-pole, 5-wire grounding. We also offer all design styles to meet any application, including: Hart-Lock ®, AutoGrip ® , Po werLock ® , safety grip® , California standard, watertight insulated, isolated ground, corrosion resistant, and midget. Cooper's tough locking receptacles meet NEMA/ANSI standards, are UL listed, and many models are CSA approved. All of our locking devices meet or surpass the most stringent industry performance standards established by the national electrical manufacturers Association, Underwriters Laboratories, and Federal specifications. Cooper's designs are easy to install, and each attractively finished product is inspected at the point of manufacture and tested for electrical and mechanical performance, as well as for safety characteristics, before packing.

Eaton Wiring Devices Hart-Lock Locking Receptacle, Standard 3-Phase, 250 VAC, 20 A, 3 Pole, 4 Wires, NEMA L15-20 NEMA Rating, Industrial Grade, -40 to 105 deg C, Back/Side Wire Terminal, Nylon, Black, 3.28 in H x 1.62 in W x 1.03 in D Dimensions

• Rugged fiberglass reinforced nylon body
• Clearly marked rating, NEMA configuration and approval listings on receptacle face
• One piece brass contacts offer superior performance and minimum heat rise
• Back wire terminal clamps for easy secure wiring
• Combination head screws standard slot/Phillips in the US
• Canadian screws slot/Robertson head combination
• Safety ground clip provided for fast installation
• Grounding receptacle
• Made of glass filled nylon