ASTM D149 Dielectric Breakdown Voltage and Dielectric Strength of Insulating Materials
The ability of a lubricant to resist electrical flow and current potential can be determined with this test. The dielectric strength is the ratio of the thickness of the insulating material in mils versus the potential of the breakdown voltage. The breakdown voltage is the electrical potential required to overcome the material's insulating ability. These electrical properties can determine if a material is appropriate for use in a particular electrical application.