Wiring Device-Kellems Insulgrip® Straight Blade Plug, 3-Phase Grounding Standard Cord Mount, 250 VAC, 50 A, 7.5 hp, 3 Pole, 4 Wires, 15-50P NEMA Rating, Commercial/Industrial Grade, IP20 Enclosure, 0.625 to 1.31 in Diameter Cord, -40 to 75 deg C, Screw Terminal, Composite, Black/White, 4.5 in L x 3.38 in W x 2.37 in H