ASTM D2308-07(2020)

Standard Specification for Thermoplastic Polyethylene Jacket for Electrical Wire and Cable

ABSTRACT
This specification covers a thermoplastic jacketing compound substantially consisting of pigmented polyethylene for use in electrical wires and cables with specified nominal thicknesses and operating at specified voltages. Since the jacket material cannot be tested unless it has been formed around a conductor or cable, tests shall then be done on jacketed wires and cables solely to determine the relevant property of the jacket material and not to test the jacketed conductor or completed cable. Materials shall be suitably sampled and tested, and shall conform accordingly to the following physical and electrical properties: unaged tensile strength and elongation at rupture; tensile strength and elongation at rupture after air oven aging; absorption coefficient; heat distortion; environmental stress-cracking; surface resistivity; and U-bend discharge.
SCOPE
1.1 This specification covers a thermoplastic jacketing compound for 2 to 35 kV wire and cable, of at least 0.030 in. (0.76 mm) nominal thickness, consisting substantially of pigmented polyethylene.  
1.2 In many instances the jacket material cannot be tested unless it has been formed around a conductor or cable. Therefore, tests done on jacketed wire and cable in this specification are solely to determine the relevant property of the jacket material and not to test the jacketed conductor or completed cable.  
1.3 Whenever two sets of values are presented, in different units, the values in the first set are to be regarded as standard. The values given in parentheses are mathematical conversions that are provided for information only and are not considered standard.  
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

• Status: Historical
• Publication Date: 31-Jul-2020
• ICS: 29.035.20 - Plastics and rubber insulating materials
• Technical Committee: D09 - Electrical and Electronic Insulating Materials
• Drafting Committee: D09.07 - Electrical Insulating Materials

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation:D2308 −07 (Reapproved 2020)
Standard Specification for
Thermoplastic Polyethylene Jacket for Electrical Wire and
1
Cable
This standard is issued under the fixed designation D2308; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope D3349Test Method for Absorption Coefficient of Ethylene
Polymer Material Pigmented with Carbon Black
1.1 Thisspecificationcoversathermoplasticjacketingcom-
pound for 2 to 35 kV wire and cable, of at least 0.030 in.
3. Terminology
(0.76 mm) nominal thickness, consisting substantially of pig-
3.1 Definitions:
mented polyethylene.
3.1.1 Refer to Terminology D1711 for definitions of terms
1.2 In many instances the jacket material cannot be tested
used in this specification.
unless it has been formed around a conductor or cable.
3.2 Definitions of Terms Specific to This Standard:
Therefore, tests done on jacketed wire and cable in this
3.2.1 aging, (act of), n—exposure of materials to air at
specification are solely to determine the relevant property of
100 °C for either 24 or 48 h.
the jacket material and not to test the jacketed conductor or
4. Physical Properties
completed cable.
4.1 The polyethylene before application to the wire or cable
1.3 Whenever two sets of values are presented, in different
shall comply with the requirements for Type I, Class C,
units, the values in the first set are to be regarded as standard.
Category 4 or 5, Grade E5 or J3 of Specification D1248,or
The values given in parentheses are mathematical conversions
Class B with equivalent weathering requirements to Class C
that are provided for information only and are not considered
materials. The requirements of Specification D1248 shall not
standard.
apply to the jacket removed from the wire or cable. The
1.4 This international standard was developed in accor-
compound is suitable for exposure to sunlight and other
dance with internationally recognized principles on standard-
atmospheric environments at temperatures between −55
ization established in the Decision on Principles for the
and +75 °C, and a minimum installation temperature
Development of International Standards, Guides and Recom-
of−40 °C.
mendations issued by the World Trade Organization Technical
Barriers to Trade (TBT) Committee. 4.2 Specimensremovedfromthewireorcableandtestedat
20to28°C(68to82°F)shallconformtotherequirementsfor
2. Referenced Documents
physical properties specified in Table 1. Alternatively, the
2
jacket shall be air-oven aged without removal from the
2.1 ASTM Standards:
conductor.
D1248Specification for Polyethylene Plastics Extrusion
Materials for Wire and Cable
4.3 Environmental Stress-cracking Test—The jacket shall
D1693Test Method for Environmental Stress-Cracking of
conform to the requirements for Grade E5 as specified in
Ethylene Plastics
Table3 of Specification D1248.
D1711Terminology Relating to Electrical Insulation
4.4 Absorption Coeffıcient—See Test Method D3349. In-
D2633Test Methods for Thermoplastic Insulations and
stead of testing the jacket removed from the conductors, a
Jackets for Wire and Cable
certification by the polyethylene compound manufacturer that
this requirement has been complied with shall suffice.
1
This specification is under the jurisdiction of ASTM Committee D09 on
Electrical and Electronic Insulating Materials and is the direct responsibility of 5. Electrical Properties
Subcommittee D09.07 on Electrical Insulating Materials.
5.1 The polyethylene jacket shall conform to the require-
Current edition approved Aug. 1, 2020. Published September 2020. Originally
approved in 1964. Last previous edition approved in 2013 as D2308–07 (2013). ments for electrical properties specified in Table 2.
DOI: 10.1520/D2308-07R20.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or 6. Sampling
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
6.1 Unless otherwise instructed, sample the jacket in accor-
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. dance with Test Methods D2633.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
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D2308−07 (2020)
TABLE 1 Physical Properties
8. Retest
Unaged Requirements:
8.1 If all of the specimens pass the test described, the lot of
Tensile strength, min, psi (MPa) 1400 (9.7)
Elongation at rupture, min, % 350
cable that they represent shall be considered to meet the
Aged Requirements:
requirements of this specification.
After air-oven aging at 100±1°Cfor48h
(
...

This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: D2308 − 07 (Reapproved 2013) D2308 − 07 (Reapproved 2020)
Standard Specification for
Thermoplastic Polyethylene Jacket for Electrical Wire and
1
Cable
This standard is issued under the fixed designation D2308; 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
1.1 This specification covers a thermoplastic jacketing compound for 2 to 35 kV wire and cable, of at least 0.030 in. (0.76 mm)
(0.76 mm) nominal thickness, consisting substantially of pigmented polyethylene.
1.2 In many instances the jacket material cannot be tested unless it has been formed around a conductor or cable. Therefore, tests
done on jacketed wire and cable in this specification are solely to determine the relevant property of the jacket material and not
to test the jacketed conductor or completed cable.
1.3 Whenever two sets of values are presented, in different units, the values in the first set are the standard, while those first set
are to be regarded as standard. The values given in parentheses are for information only. mathematical conversions that are
provided for information only and are not considered standard.
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.
2. Referenced Documents
2
2.1 ASTM Standards:
D1248 Specification for Polyethylene Plastics Extrusion Materials for Wire and Cable
D1693 Test Method for Environmental Stress-Cracking of Ethylene Plastics
D1711 Terminology Relating to Electrical Insulation
D2633 Test Methods for Thermoplastic Insulations and Jackets for Wire and Cable
D3349 Test Method for Absorption Coefficient of Ethylene Polymer Material Pigmented with Carbon Black
3. Terminology
3.1 Definitions:
3.1.1 Refer to Terminology D1711 for definitions of terms used in this specification.
3.2 Definitions of Terms Specific to This Standard:
1
This specification is under the jurisdiction of ASTM Committee D09 on Electrical and Electronic Insulating Materials and is the direct responsibility of Subcommittee
D09.07 on Electrical Insulating Materials.
Current edition approved March 1, 2013Aug. 1, 2020. Published March 2013September 2020. Originally approved in 1964. Last previous edition approved in 20072013
as D2308 – 07.D2308 – 07 (2013). DOI: 10.1520/D2308-07R13.10.1520/D2308-07R20.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
D2308 − 07 (2020)
3.2.1 aging, (act of), n—exposure of materials to air at 100 °C 100 °C for either 24 or 48 h.
4. Physical Properties
4.1 The polyethylene before application to the wire or cable shall comply with the requirements for Type I, Class C, Category 4
or 5, Grade E5 or J3 of Specification D1248, or Class B with equivalent weathering requirements to Class C materials. The
requirements of Specification D1248 shall not apply to the jacket removed from the wire or cable. The compound is suitable for
exposure to sunlight and other atmospheric environments at temperatures between −55 and +75 °C, and a minimum installation
temperature of −40 °C.of −40 °C.
4.2 Specimens removed from the wire or cable and tested at 20 to 28 °C (68 to 82 °F) shall conform to the requirements for
physical properties specified in Table 1. Alternatively, the jacket shall be air-oven aged without removal from the conductor.
4.3 Environmental Stress-CrackingStress-cracking Test—The jacket shall conform to the requirements for Grade E5 as specified
in Table 3 of Specification D1248.
4.4 Absorption Coeffıcient—See Test Method D3349. Instead of testing the jacket removed from the conductors, a certification by
the polyethylene compound manufacturer that this requirement has been complied with shall suffice.
5. Electrical Properties
5.1 The polyethylene jacket shall conform to the requirements for
...