Locking Plug, Connection Orientation Straight, Current Rating 30 A, Housing Color Black, White, Housing Material Composite, NEMA Plug Configuration L21-30P, Number of Blades 5, Number of Poles 4, Phase Three, Polarized Yes, Resistance Properties Chemical Resistant, Impact Resistant, Voltage Rating 120/208V AC, Wire Connection Type Screw Terminals, Wiring Style Standard, Face Diameter 1.89 in, For Maximum Cable Diameter 0.95 in, For Minimum Cable Diameter 0.3 in, Grade Industrial