Watertight Mechanical Interlock Device, Amps 30 A, Fused / Nonfused Nonfused, Phase 3, Voltage 600V AC, Number of Poles 3, Number of Wires 4, HP 20 hp, Accepts Plug Number 3D150, Use With 3D150, Includes 4, Viewing Window No. This item has been restricted from sale in the following state (s): []