12.1?The dielectric breakdown voltage of the sleeving is of importance as a measure of its ability to withstand electrical stress without failure. This value does not correspond to the dielectric breakdown voltage expected in service, but is of value in comparing different materials or different lots, in controlling manufacturing processes or, when coupled with experience, for a limited degree of design work. The comparison of dielectric breakdown voltage of the same sleeving before and after environmental conditioning (moisture, heat, and the like) gives a measure of its ability to resist these effects. For a more detailed discussion, refer to Test Method D149.

1.1?These test methods cover procedures for testing electrical insulating sleeving comprising a flexible tubular product made from a woven textile fibre base, such as cotton, rayon, nylon, or glass, thereafter impregnated, or coated, or impregnated and coated, with a suitable dielectric material.

1.2?The procedures appear in the following sections:

Procedures	Section(s)
?	?
Selection of Test Material	5
Conditioning	6
Dimensions	7 to 11
Dielectric Breakdown Voltage	12 to 17
Brittleness Temperature	18 to 21
Flammability (See Test Methods D8355)	22 to 23
Dielectric Breakdown Voltage After Short-Time Aging	24 to 28
Oil Resistance	29 to 32
Thermal Endurance	33 to 39
Compatibility of Sleeving with Magnet Wire Insulation	40 to 54
Solvent Resistance	55 to 60
Hydrolytic Stability	61 to 67
Effect of Push-Back After Heat Aging	68 to 73

1.3?The values stated in inch-pound units, except for ?C, are to be regarded as the standard. The values in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.

1.4?This is a fire-test-response standard. See Test Methods D8355, which contains procedures for flammability tests.

1.5?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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. For specific hazard statements, see 40.2 and 58.1.1.

1.6?This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.