The 18 Series ball nose plugs, receptacles and connectors are used by the broadcast industry in Canada, as well as the welding industry in the United States. Single or double set screw termination NEMA 3R-rated for outdoor use when mated UL1691, 508, 35k A/600V short circuit current rating Color-coding provides fast and easy phase identification Common applications: entertainment, oil and gas, mining operations, power distribution, construction sites and other temporary power applications