1.1 This specification covers acceptance testing of rubber insulating blankets for protection of workers from accidental contact with live electrical conductors, apparatus, or circuits. 1.2 Two types of blankets are provided and are designated as Type I, not resistant to ozone, and Type II, resistant to ozone. 1.3 Five classes of blankets, differing in electrical characteristics, are provided and are designated as Class 0, Class 1, Class 2, Class 3, and Class 4. 1.4 Two styles of blankets, differing in construction characteristics, are provided and are designated as Style A and Style B. 1.5 The following safety hazards caveat pertains only to the test method portion, Sections 16 - 19 , of this specification: This standard does not purport to address all of the safety concerns, 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.