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ASTM D4325-20

ASTM D4325-20

Standard Test Methods for Nonmetallic Semi-Conducting and Electrically Insulating Rubber Tapes

2020-09-03 /Active
Significance and Use:

5.1 The physical and electrical properties, including break strength, elongation, dielectric strength, dissipation factor, permittivity, fusion, etc., will vary with temperature and moisture content. Control the temperature and moisture content of the sample for these test methods to yield consistent and reproducible results.


1.1 These test methods cover the methods and procedures for testing electrically insulating and semi-conducting rubber tapes designed for splicing, terminating, and sheath repair of electrical wire and cable.

1.2 The test methods appear in the following sections:



Referenced Documents




Dielectric Strength

35 – 40


11 – 16

Dissipation Factor

22 – 26


17 – 21

Heat Exposure

46 – 49


7 – 10

Ozone Resistance

41 – 45


22 – 26

Sample Requirements


Tensile Strength

17 – 21

Volume Resistivity

27 – 34

Ultraviolet and Weather Resistance

50 – 54

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

Note 1: There is no IEC equivalent to these methods.

1.4 Unless otherwise stated, measurements are made on tapes from which the removable separator has been removed.

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 warning statement see 43.1.

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.

dielectric strength; dissipation factor; elongation; fusion; heat exposure; ozone resistance; permittivity; rubber electrical insulating tape; rubber semi-conducting nonmetallic tape; tensile strength; ultraviolet and weather exposure; volume resistivity ;
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