U-Line ECCL/ECC Factory Sealed 20 A Cable Connectors provide an easy way to extend the reach of your power supply to areas where a standard or U-Line receptacle may not be available. A gasket in the throat of the cable connector seals around the U-Line plug powering your equipment, protecting against moisture and combustible dusts. A twist with an audible click locks the plug in place and energizes the connector. When not in use, a spring cover seals the connector against the environmental elements.