Bryant Electric 4770NP Locking Plug

Bryant 4770NP is an industrial heavy-duty locking plug (NEMA L7-15P) rated for 15 A at 277 V AC in a 2-pole, 3-wire configuration. It features a durable nylon housing in black and white and provides screw-terminal wiring for a secure connection. The plug accepts cords with diameters from 0.30 to 0.65 inches and uses Bryant's Triple-Gripper cord grip to resist pull-out and maintain a tight engagement with compatible Bryant locking receptacles. In Bryant's catalog, the 4770NP is described as an Industrial Heavy Duty Locking Plug with a nylon housing and screw-terminal wiring, designed for use with 0.3–0.65 inch cords on 277 V systems. The L7-15P configuration identifies it as a 15 A, 277 V, single-phase locking connection, commonly paired with Bryant locking receptacles to form a twist-lock power cord connection in industrial environments.