Watertight Locking Plug, Connection Orientation Straight, Current Rating 20 A, Housing Color Black, White, Housing Material Polybutylene Terephthalate, NEMA Plug Configuration L7-20P, Number of Blades 3, Number of Poles 2, Phase Single, Polarized Yes, Resistance Properties , Impact , Watertight, Voltage Rating 277V AC, Wire Connection Type Screw Terminals, Wiring Style Standard, Face Diameter 2.77 in, For Maximum Cable Diameter 0.93 in