This durable, dependable receptacles feature a permanently marked, differentiated solution that meets all necessary code requirements. The controlled receptacle marking printed on the face of the receptacle is both NEMA approved and compliant with the National electrical Code®, CA Title 24, and ASHRAE energy efficiency standard 90.1. This clear, permanent marking helps end users differentiate controlled receptacles from others. Corrosion resistant plated steel straps and high strength nylon faces make these receptacles perfect for any hard use application. They feature 1-piece, triple wipe brass contacts for lasting retention. And screw pressure plate back wiring makes installation fast and easy.