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    ASTM D470 - 21

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

    Active Standard ASTM D470 | Developed by Subcommittee: D09.07

    Book of Standards Volume: 10.01

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    Significance and Use

    5.1 Physical tests, properly interpreted, provide information with regard to the physical properties of the insulation or jacket. The physical test values give an approximation of how the insulation will physically perform in its service life. Physical tests provide useful data for research and development, engineering design, quality control, and acceptance or rejection under specifications.

    1. Scope

    1.1 These test methods cover procedures for testing crosslinked insulations and jackets for wire and cable. To determine the test to be made on the particular insulation or jacket, refer to the product specification for that type. These test methods do not apply to the class of products known as flexible cords.

    1.2 In many instances the insulation or jacket cannot be tested unless it has been formed around a conductor or cable. Therefore, tests are done on insulated or jacketed wire or cable in these test methods solely to determine the relevant property of the insulation or jacket and not to test the conductor or completed cable.

    1.3 These test methods appear in the following sections:

    Test Method




    AC and DC Voltage Withstand Tests

    22 to 29

    Capacitance and Dissipation Factor Tests

    38 to 44

    Cold Bend


    Cold Bend, Long-time Voltage Test on Short Specimens

    51 to 57

    Double AC Voltage Test on Short Specimens

    45 to 50

    Electrical Tests of Insulation

    17 to 64

    Heat Distortion Test


    Horizontal Flame Test

    (Test Method D7936)

    Insulation Resistance Tests on Completed Cable

    30 to 37

    Mineral Filler Content, Determination of

    107 to 111

    Ozone Resistance Test

    87 to 99

    Partial-Discharge Test

    58 to 64

    Physical Tests of Insulation and Jacket Compounds

    5 to 16

    Surface Resistivity Test

    112 to 116

    Track Resistance Test

    125 to 128

    U-Bend Discharge Test

    117 to 121

    Water Absorption Test

    65 to 71

    Water Absorption Test, Accelerated

    72 to 86

    Water Absorption Test on Fibrous Coverings

    101 to 106

    1.4 Whenever two sets of values are presented, in different units, the values in the first set are the standard, while those in the parentheses are for information only.

    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 hazards see Section 4.

    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

    D454 Test Method for Rubber Deterioration by Heat and Air Pressure

    D572 Test Method for RubberDeterioration by Heat and Oxygen

    D573 Test Method for RubberDeterioration in an Air Oven

    D1193 Specification for Reagent Water

    D1711 Terminology Relating to Electrical Insulation

    D2132 Test Method for Dust-and-Fog Tracking and Erosion Resistance of Electrical Insulating Materials

    D3755 Test Method for Dielectric Breakdown Voltage and Dielectric Strength of Solid Electrical Insulating Materials Under Direct-Voltage Stress

    D5423 Specification for Forced-Convection Laboratory Ovens for Evaluation of Electrical Insulation

    D7936 Test Method for Flammability of Electrical Insulating Materials Intended for Wires or Cables When Burning in Horizontal Configuration

    ICEA Standard

    T-24-380 Guide for Partial-Discharge Procedure

    ICS Code

    ICS Number Code 29.035.01 (Insulating materials in general)

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

    DOI: 10.1520/D0470-21

    Citation Format

    ASTM D470-21, Standard Test Methods for Crosslinked Insulations and Jackets for Wire and Cable, ASTM International, West Conshohocken, PA, 2021, www.astm.org

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