Woodhead 28W76 Watertite Wet Location Locking Blade Plug, 3-Phase, 4 Wires, 3 Poles, NEMA L16-30 Configuration, Yellow, 30A Current, 480V Voltage Multiple seal plug/connector interface keeps out contaminants; resists vapor and water from high-pressure wash d up to 1000Psi Color-coded " terminal screws preset in open position, ready to wire Wire screw terminals are tri-drive to be used with straight blade, phillips and square-drive screw drivers Floating blade construction provides self-alignment, and a better mechanical and electrical connection minimizing wear and heat generation Transparent wiring guide to verify all wire strands are in place before securing wire