Wiring Device-Kellems Twist-Lock® Elastogrip® Female Connector, 3-Phase Isolated Grounding Standard Sized Water/Dust-Tight Cord Mount Watertight, 480 Delta VAC, 20 A, 3 Pole, 4 Wires, L16-20R/WD1/WD6 NEMA Rating, Commercial/Industrial Grade, NEMA 4/4X/6/6P/12/IP65/IP66/IP67 Enclosure, 3/8 to 7/8 in Diameter Cord, -40 to 75 deg C, Screw Terminal, Elastomer/Composite, Yellow, 2.51 x 2.51 x 5.69 in