Wiring Device-Kellems Twist-Lock® Insulgrip® Locking Connector, Heavy Duty Grounding Cord Mount, 480 VAC, 30 A, 10 hp, 3 Pole, 4 Wires, L16-30R NEMA Rating, Industrial Grade, IP20 Enclosure, 0.63 to 1.2 in Diameter Cord, -40 to 75 deg C, Pressure Screw Terminal, Nylon, Black/White, 2.33 x 2.33 x 3.86 in