Receptacle duplex with isolated ground. Corrosion-resistant plated steel strap locked into back body. One-piece nickel-plated triple-wipe power contacts for lasting retention. Impact-resistant nylon face. Patented feature, external screw-pressure-plate back wire clamp on ground terminal for faster, easier installation. Plastic barrier isolates grounding terminal from mounting strap and metal boxes. Internal screw-pressure-plate back wire clamps with #10 brass terminal screws for visual assurance of a good connection. Auto-ground clip assures positive ground.