Locking Connector Connection Orientation Straight Current Rating 20 A Housing Color Black White Housing Material Nylon IP Rating IP20 NEMA Receptacle Configuration L7-20R Number of Poles 2 Number of Wires 3 Phase Single Resistance Properties Impact Resistant Shrouded No Voltage Rating 277V AC Wire Connection Type Spring Clamp Terminals Wiring Style Standard Cap Type No Cap or Cover Contact Material Copper For Maximum Cable Diameter 0.93 in For Minimum Cable Diameter 0.36 in