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    ASTM D4325 - 20

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

    Active Standard ASTM D4325 | Developed by Subcommittee: D09.07

    Book of Standards Volume: 10.02

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    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. Scope

    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.

    2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

    ASTM Standards

    D149 Test Method for Dielectric Breakdown Voltage and Dielectric Strength of Solid Electrical Insulating Materials at Commercial Power Frequencies

    D150 Test Methods for AC Loss Characteristics and Permittivity (Dielectric Constant) of Solid Electrical Insulation

    D257 Test Methods for DC Resistance or Conductance of Insulating Materials

    D412 Test Methods for Vulcanized Rubber and Thermoplastic ElastomersTension

    D470 Test Methods for Crosslinked Insulations and Jackets for Wire and Cable

    D750 Practice for Rubber Deterioration Using Artificial Weathering Apparatus

    D4388 Specification for Nonmetallic Semi-Conducting and Electrically Insulating Rubber Tapes

    D4496 Test Method for D-C Resistance or Conductance of Moderately Conductive Materials

    E591 Practice for Safety and Health Requirements Relating to Occupational Exposure to Ozone

    ICS Code

    ICS Number Code 29.035.20 (Plastic and rubber insulating materials)

    UNSPSC Code

    UNSPSC Code 31201502(Electrical insulating tape)

    Referencing This Standard
    Link Here
    Link to Active (This link will always route to the current Active version of the standard.)

    DOI: 10.1520/D4325-20

    Citation Format

    ASTM D4325-20, Standard Test Methods for Nonmetallic Semi-Conducting and Electrically Insulating Rubber Tapes, ASTM International, West Conshohocken, PA, 2020, www.astm.org

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