Residential/Commercial/Industrial Grade 50 amp receptacle, NEMA 10-30R 30 Amp, 125/250 Volt, 3-wire (no ground), only accepts 10, 8, 6, and 4 gauge (AWG) copper wire, environmental UL94 flammability, V2 Rating Made of Polycarbonate Thermoplastic (PCT) material and heavy gauge steel; zinc-plated steel strap is corrosion resistant and built to last in harsh environments Easy installation; best used for older homes and older appliances with no ground contact Fits both single and 2-gang box styles; terminals marked for identification; all hardware included; wall plate sold separately; 1-year warranty; UL Listed