Original poster: "Eastern Voltage Research Corporation" <dhmccauley-at-easternvoltageresearch-dot-com> I'm curious to find out what power level has to do with the dielectric strength of the polyethylene or delrin. Thanks Dan > I've used both UHMW poly and black Delrin. They both seem to work even at > power levels of 15 kVA. > > Dr. Resonance