ASTM D4872-14(2020)
(Test Method)Standard Test Method for Dielectric Testing of Wire and Cable Filling Compounds
Standard Test Method for Dielectric Testing of Wire and Cable Filling Compounds
SIGNIFICANCE AND USE
5.1 Dissipation factor, permittivity, and dc volume resistivity are properties of communication cable fillers and filler components that are controlled in order that the cable's electrical performance falls within its design limits. Relatively small amounts of contaminants, such as polar compounds, water, or salts degrade the cable's electrical properties. Limits on the dielectric properties of the cable filling compound are usually specified by the cable manufacturer, by industry standards or both.
SCOPE
1.1 This test method covers the determination of dissipation factor, permittivity (dielectric constant), and ac volume resistivity of wire and cable filling compounds and related materials that are solid at room temperature, but capable of being melted at elevated temperature.
1.2 Whenever two sets of values are presented, in different units, the values in the first set are the standard, while those in parentheses are for information only.
1.3 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. Specific hazard statements are given in Section 7.
1.4 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.
General Information
Relations
Standards Content (Sample)
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.
Designation: D4872 − 14 (Reapproved 2020)
Standard Test Method for
Dielectric Testing of Wire and Cable Filling Compounds
This standard is issued under the fixed designation D4872; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope D1711 Terminology Relating to Electrical Insulation
D6054 Practice for Conditioning Electrical Insulating Mate-
1.1 This test method covers the determination of dissipation
rials for Testing (Withdrawn 2012)
factor, permittivity (dielectric constant), and ac volume resis-
tivity of wire and cable filling compounds and related materials
3. Terminology
that are solid at room temperature, but capable of being melted
3.1 Definitions:
at elevated temperature.
3.1.1 For definitions of terms used in this test method, refer
1.2 Whenever two sets of values are presented, in different
to Terminology D1711.
units, the values in the first set are the standard, while those in
parentheses are for information only.
4. Summary of Test Method
1.3 This standard does not purport to address all of the
4.1 Place a measured volume of melted sample, free of
safety concerns, if any, associated with its use. It is the
entrapped air, into a level preheated specimen dish. Allow the
responsibility of the user of this standard to establish appro-
specimen to cool and place primary and secondary electrodes
priate safety, health, and environmental practices and deter-
in uniform contact with the specimen surface. Connect test
mine the applicability of regulatory limitations prior to use.
leads to the specimen dish and the cover plate electrode; make
Specific hazard statements are given in Section 7.
measurements to obtain values from which dissipation factor,
1.4 This international standard was developed in accor-
permittivity, and dc volume resistivity are calculated.
dance with internationally recognized principles on standard-
ization established in the Decision on Principles for the
5. Significance and Use
Development of International Standards, Guides and Recom-
5.1 Dissipation factor, permittivity, and dc volume resistiv-
mendations issued by the World Trade Organization Technical
ity are properties of communication cable fillers and filler
Barriers to Trade (TBT) Committee.
components that are controlled in order that the cable’s
electrical performance falls within its design limits. Relatively
2. Referenced Documents
small amounts of contaminants, such as polar compounds,
2.1 ASTM Standards:
water, or salts degrade the cable’s electrical properties. Limits
D150 Test Methods forAC Loss Characteristics and Permit-
on the dielectric properties of the cable filling compound are
tivity (Dielectric Constant) of Solid Electrical Insulation
usually specified by the cable manufacturer, by industry
D257 Test Methods for DC Resistance or Conductance of
standards or both.
Insulating Materials
D1321 Test Method for Needle Penetration of Petroleum
6. Apparatus
Waxes
6.1 Specimen Dish and Cover Electrode, as shown in Fig. 1.
Use a gold- or nickel-plated specimen dish and cover electrode
plate to ensure a corrosion resistant, high conductivity surface.
This test method is under the jurisdiction of ASTM Committee D09 on
6.1.1 Clean the specimen dish and electrode plate of oxida-
Electrical and Electronic Insulating Materials and is the direct responsibility of
Subcommittee D09.07 on Electrical Insulating Materials.
tion by rinsing in a 5 % hydrochloric acid solution for a
Current edition approved Aug. 1, 2020. Published August 2020. Originally
maximum of 5 s, followed by distilled water, isopropyl alcohol
approved in 1988. Last previous edition approved in 2014 as D4872 – 14. DOI:
and,finally,byalowboilingpetroleumdistillate(naphtha)(see
10.1520/D4872-14R20.
Section 7). Alternatively (preferred), use an ultrasonic cleans-
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
ing bath. Store the dish and cover, wrapped in paper towels, in
Standards volume information, refer to the standard’s Document Summary page on
a desiccator or in an oven maintained at 50°C.
the ASTM website.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Standards volume information, refer to the standard’s Document Summary page on The last approved version of this historical standard is referenced on
the ASTM website. www.astm.org.
*A Summary of Changes section appears at the end of this standard
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D4872 − 14 (2020)
9. Calibration and Standardization
9.1 Follow the calibration and standardizat
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