SpecificationsHazardous Area ClassificationClass I, Division 1 and 2, Groups B, C, D; Class II, Division 1 and 2, Groups F, G; Class III; NEMA Type 4, 7BCD, 9GFAmperage15 and 20Voltage125 Vac or 250 VacNumber of Poles3Number of Wires2Plug Cable Diameter.538 – .639Plug Cable Diameter.538 – .639ECP Pl..