Hubbell® wiring Device-Kellems products have long set the standard for innovation, performance, safety and reliability. Temporary power installations are unique and unpredictable and therefore are very demanding. The most critical mission is to keep the equipment running. Hubbell® devices have the proven reliability to deliver secure connections allowing you to focus attention on what matters most. Hubbell® single pole devices are extremely durable. The double cam contact design can stand up to repeated mating and un-mating. The added protection of UL type 4X, 12 environmental rating stands up to the most abusive environments. The engineered body design makes installation simple with no need for additional tools and the non-metallic retaining screw helps to make operation safe for all involved.