Description
The effort to harmonize North American electrical standards initiated investigation of the ability of 600 V conductors to operate at 1,000 V. Associated changes to product standards are currently debated. This paper presents data to illustrate the behavior of PVC and XLPE insulations when exposed to 1,000 V. Variables such as additives, insulation thicknesses, and measurement technique greatly affect results. The lastest testing allows manufacturers to offer XHHW-2 at a new 1,000 V rating.