This test method covers the determination of the thermal failure of solid electrical insulating materials subjected to electric stress at commercial power frequencies. This test method has been developed for testing materials such as certain glasses and ceramics that exhibit large increases in dielectric loss with increasing temperature.

Formerly under the jurisdiction of Committee D09 on Electrical and Electronic Insulating Materials, this test method was withdrawn in 2007 in accordance with section 10.5.3.1 of the Regulations Governing ASTM Technical Committees, which requires that standards shall be updated by the end of the eighth year since the last approval date.

1.1 This test method covers the determination of the thermal failure of solid electrical insulating materials subjected to electric stress at commercial power frequencies. This test method has been developed for testing materials such as certain glasses and ceramics, that exhibit large increases in dielectric loss with increasing temperature.

1.2 This standard does not purport to address all of the safety problems, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. A specific hazard statement is given in 10.1.