Locking Plug Connection Orientation Straight Current Rating 20 A Housing Color Black Housing Material Nylon NEMA Plug Configuration L14-20P Number of Blades 4 Number of Poles 3 Phase Single Polarized Yes Resistance Properties Chemical Resistant Impact Resistant Voltage Rating 125/250V AC Wire Connection Type Screw Terminals Wiring Style Standard Face Diameter 2.21 in For Maximum Cable Diameter 1.15 in For Minimum Cable Diameter 0.35 in Grade Industrial Grounding Grounded