ASTM D4325-20 - 1.8.2020
 
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:

 

Section

Referenced Documents

2

Conditioning

56

Dielectric Strength

35 – 40

Dimensions

11 – 16

Dissipation Factor

22 – 26

Elongation

17 – 21

Heat Exposure

46 – 49

Fusion

7 – 10

Ozone Resistance

41 – 45

Permittivity

22 – 26

Sample Requirements

4

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

D149-25

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

D150-22

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

D257-14(2021)e1

Standard Test Methods for DC Resistance or Conductance of Insulating Materials (Includes all amendments and changes 5/6/2021).

D4496-21e1

Standard Test Method for D-C Resistance or Conductance of Moderately Conductive Materials (Includes all amendments and changes 12/8/2022).

D374-99

Standard Test Methods for Thickness of Solid Electrical Insulation

D412-16(2021)

Standard Test Methods for Vulcanized Rubber and Thermoplastic Elastomers—Tension

D470-21

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

D750-12(2021)

Standard Practice for Rubber Deterioration Using Artificial Weathering Apparatus

D4388-20

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

E591-80

Practice for Safety and Health Requirements Relating to Occupational Exposure to Ozone (Withdrawn 1990)