Commercial power receptacle 30 A, 125 V NEMA TT-30 2-pole/3-wire. Heavy-duty design and construction make Arrow Hart power devices ideal for any high amperage industrial or commercial power connectivity application.Flush receptacles feature heavy-gauge galvanized steel mounting strap and glass reinforced nylon bodyHeavy-gauge galvanized steel mounting strap for corrosion resistanceFlush receptacles fit one- or two-gang enclosuresSurface receptacles have patented lay in terminals that accept up to #4 AWG wireSurface receptacle backs feature concentric knockouts and an adjustable cord clamp to allow wiring from back or bottom