This locking plug has three poles, is single phase, a voltage rating of 250V DC/600V AC, and an operating temperature range of -40 Degrees C to 75 Degrees C. It has the following resistance properties: chemical resistant, impact resistant, plus it measures 2.56 inch L. This locking plug meets the standards for CSA, UL 498. It is black/white, and has 8 AWG minimum wire size to 4 AWG maximum wire size.