Leviton 4779-PLC 15 Amp, 277 Volt, 2-Pole, 3-Wire, Locking Connector, Industrial Grade, Grounding, Power Indication, Black-White Super Tough Nylon Body Resists Damage From Severe Impact, Abrasion and Chemicals NEMA and Non-NEMA Configurations Available Long Life LED Bulb Indicates Power is Present at the Device Solid Brass Blades And Contacts Feature Improved Conductivity, Low Resistance, Low Heat, and Long Life Internal Wiring Chambers Isolate Individual Conductors to Prevent Flashover, Arcing, and Stray Strands of Wire