Pin and Sleeve Connector, Type Grounding Style I, Amps 100, Color Gray, Voltage 600VAC/250VDC, Phase 1 or 3, Number of Poles 3, Number of Wires 4, Material of Construction Valox Housing and Aluminum Shroud, Standards UL/CSA Type 4X Pin and Sleeve DevicesInterchangeable with traditional all-metallic pin and sleeve devices built to UL 1686-C1. Insulgrip pin and sleeve plugs and connectors have a metallic shroud to provide ground and protect pins, and a watertight, nonmetallic housing for corrosion resistance and electrical safety. Style I plugs and connectors ground through their metallic shroud, and receptacles are grounded via ground lug in the aluminum back box. Style II devices have a dual-ground safety feature using dedicated ground pin. Receptacle back boxes available; see this page. Gray color.UL Listed, CSA Certified.