EATON WD1252 2-Pole 3-Wire 50-Amp 125-Volt Surface Mount Power Receptacle, Black Features heavy galvanized steel and mounting strap to resist corrosion. Patented lay-in terminals accept up to #4 AWG Back features concentric knockouts and an adjustable cord clamp to allow wiring from back and bottom Features 2-Pole/3-Wiring with a Nema Standard of 6-50R with 125/250 Voltage To be used with aluminum or copper wiring Total Power Outlets : 1