Leviton 2631-PLC 30 Amp, 277 Volt, NEMA L7-30P, 2P, 3W, Industrial Grade Locking Plug, 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