This flush receptacle has three poles, three phases, a voltage rating of 480V AC, and an operating temperature range of -40 Degrees F to 185 Degrees F. It has the following resistance properties: corrosion resistant, moisture resistance. This flush receptacle meets the standards for CSA C22.2 No.42, Fed.Spec. W-C-596, UL 498, RoHS: CM. It has 8 AWG minimum wire size to 16 AWG maximum wire size.