ASTM D4245-08

Standard Specification for Ozone-Resistant Thermoplastic Elastomer Insulation For Wire and Cable, 90&#176C Dry/75&#176C Wet Operation

ABSTRACT
This specification covers ozone-resistant thermoplastic elastomer insulation for electrical wires and cables operating continuously at specified conductor temperatures, within the specified voltage range, and under wet or dry conditions. The prescribed tests cannot be performed unless the insulation is formed around a conductor, but these are done solely to determine the insulation properties and not to test the conductor or completed cable. Each test sample should be subjected to ac and dc voltage withstand tests as well as insulation resistance tests and should comply with the required values for aging, heat distortion, electrical permittivity, increase in capacitance, stability factor, and accelerated water absorption.
SCOPE
1.1 This specification covers an ozone-resistant insulating compound for electrical wire and cables 14 AWG and larger. This compound consists substantially of a thermoplastic elastomer.
1.2 This type of insulation is suitable for continuous operation at conductor temperatures not exceeding 90 °C in dry locations and 75 °C in wet locations. Operating voltages are not to exceed 2000 V. The minimum installation temperature is −40 °C.
1.3 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.
1.4 In many instances the insulation material cannot be tested unless it has been formed around a conductor or cable. Therefore, tests are done on insulated wire or cable in this document solely to determine the relevant property of the insulation material and not to test the conductor or completed cable.

General Information

• Status: Historical
• Publication Date: 31-Oct-2008
• ICS: 29.035.20 - Plastics and rubber insulating materials
• Technical Committee: D09 - Electrical and Electronic Insulating Materials

Relations

• Replaces: ASTM D4245-02 - Standard Specification for Ozone-Resistant Thermoplastic Elastomer Insulation For Wire and Cable, 90&#176C Dry/75&#176C Wet Operation
• Effective Date: 01-Nov-2008

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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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: D4245 −08 AnAmerican National Standard
Standard Specification for
Ozone-Resistant Thermoplastic Elastomer Insulation For
1
Wire and Cable, 90 °C Dry/75 °C Wet Operation
This standard is issued under the fixed designation D4245; 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* 3.2 Definitions of Terms Specific to This Standard:
3.2.1 aging, n—exposure of materials to air at 121 °C for
1.1 This specification covers an ozone-resistant insulating
168 h.
compound for electrical wire and cables 14 AWG and larger.
This compound consists substantially of a thermoplastic elas-
4. Physical Properties
tomer.
4.1 Requirements for physical properties are listed in Table
1.2 This type of insulation is suitable for continuous opera-
1.
tion at conductor temperatures not exceeding 90 °C in dry
locations and 75 °C in wet locations. Operating voltages are
4.2 Thickness of Insulation—Table 1A (Conductor Sizes,
not to exceed 2000 V. The minimum installation temperature
Insulation Thicknesses, and AC Test Voltages for Rubber
is−40 °C.
Insulations) of Test Methods D470 lists the minimum average
thickness for the insulation. The required minimum thickness
1.3 The values stated in inch-pound units are to be regarded
is 90% of the specified average thickness.
as standard. The values given in parentheses are mathematical
conversions to SI units that are provided for information only
5. Electrical Requirements
and are not considered standard.
5.1 Order of Testing—Performtheacvoltagewithstandtest,
1.4 In many instances the insulation material cannot be
insulationresistance,anddcvoltagewithstandtestinthatorder
tested unless it has been formed around a conductor or cable.
when any of these tests are specified. The sequence of other
Therefore, tests are done on insulated wire or cable in this
testing is not specified.
document solely to determine the relevant property of the
insulation material and not to test the conductor or completed
5.2 AC Voltage Withstand Test—Unless otherwise specified,
cable.
omitthistestifthedcvoltagewithstandtestdescribedin5.4is
to be performed.Test each insulated conductor for 5 min at the
2. Referenced Documents
ac withstand voltage given in Table 1A (Conductor Sizes,
2
2.1 ASTM Standards:
Insulation Thicknesses, and AC Test Voltages for Rubber
D470Test Methods for Crosslinked Insulations and Jackets
Insulations) of Test Methods D470 under the columns labeled
for Wire and Cable
“Ozone-Resisting Insulation.”
D1711Terminology Relating to Electrical Insulation
5.3 Insulation Resistance
D2633Test Methods for Thermoplastic Insulations and
5.3.1 The insulated conductor shall have an insulation
Jackets for Wire and Cable
resistance value of at least that corresponding to a constant of
3. Terminology
10 000 at 60 °F (15.6 °C).
5.3.2 If the water temperature at the time measurement was
3.1 Definitions: For definitions of terms used in this speci-
made differs from 60 °F (15.6 °C), correct the insulation
fication refer to Terminology D1711.
resistance to 60 °F. Table 2, (Temperature Correction Factors
1 for Insulation Resistance at 60 °F), of Test Methods D470,
This specification is under the jurisdiction of ASTM Committee D09 on
Electrical and Electronic Insulating Materials and is the direct responsibility of
containsthecorrectionfactors.UsetheproceduregiveninTest
SubcommitteeD09.18onSolidInsulations,Non-MetallicShieldingsandCoverings
Methods D470 to determine the 1 °F coefficient for the
for Electrical and Telecommunication Wires and Cables.
insulation material. Multiply the measured value by the cor-
Current edition approved Nov. 1, 2008. Published December 2008. Originally
rectionfactortoobtaintheinsulationresistancevaluecorrected
approved in 1983. Last previous edition approved in 2002 as D4245–02. DOI:
10.1520/D4245-08.
to 60 °F.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
5.3.3 If the insulated conductor is covered with a non-
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
metallic sheath so that the insulation resistance can be mea-
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. sured only on the completed assembly, the required insulation
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

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D4245 − 08
TABLE 1 Requirements for Physical Properties
7. Ozone
Unaged Requirements:
7.1 The insulation shall sh
...

This document is not anASTM standard and is intended only to provide the user of anASTM 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.
An American National Standard
Designation:D4245–02 Designation: D 4245 – 08
Standard Specification for
Ozone-Resistant Thermoplastic Elastomer Insulation For
1
Wire and Cable, 90 °C Dry/75 °C Wet Operation
This standard is issued under the fixed designation D4245; 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*
1.1 This specification covers an ozone-resistant insulating compound for electrical wire and cables 14 AWG and larger. This
compound consists substantially of a thermoplastic elastomer.
1.2 This type of insulation is suitable for continuous operation at conductor temperatures not exceeding 90 °C in dry locations
and 75 °C in wet locations. Operating voltages are not to exceed 2000 V. The minimum installation temperature is−40 °C.
1.3Whenever 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 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical
conversions to SI units that are provided for information only and are not considered standard.
1.4 Inmanyinstancestheinsulationmaterialcannotbetestedunlessithasbeenformedaroundaconductororcable.Therefore,
tests are done on insulated wire or cable in this document solely to determine the relevant property of the insulation material and
not to test the conductor or completed cable.
2. Referenced Documents
2
2.1 ASTM Standards:
D470 Test Methods for Crosslinked Insulations and Jackets for Wire and Cable
D1711 Terminology Relating to Electrical Insulation
D2633Methods of Testing Test Methods for Thermoplastic Insulations and Jackets for Wire and Cable
3. Terminology
3.1 Definitions: For definitions of terms used in this specification refer to Terminology D1711.D1711.
3.2 Definitions of Terms Specific to This Standard:
3.2.1 aging, n—exposure of materials to air at 121 °C for 168 h.
4. Physical Properties
4.1 Requirements for physical properties are listed in Table 1.
4.2 Thickness of Insulation—Table 1(a)A (Conductor Sizes, Insulation Thicknesses, and AC Test Voltages for Rubber
Insulations) of Test Methods D470 lists the minimum average thickness for the insulation. The required minimum thickness is
90% of the specified average thickness.
5.Electrical Requirements Electrical Requirements
5. Electrical Requirements
5.1 Order of Testing—Perform the ac voltage withstand test, insulation resistance, and dc voltage testswithstand test in that
order when any of these tests are specified. The sequence of other testing is not specified.
5.2 AC Voltage Withstand Test—Unless otherwise specified, omit this test if the dc voltage withstand test described in 5.4 is to
beperformed.Testeachinsulatedconductorfor5minattheacwithstandvoltagegiveninTable1(a)A(ConductorSizes,Insulation
Thicknesses, and AC Test Voltages for Rubber Insulations) of Test Methods D470 under the columns labelledlabeled
“Ozone-Resisting Insulation.”
1
This specification is under the jurisdiction ofASTM Committee D09 on Electrical and Electronic Insulating Materials and is the direct responsibility of Subcommittee
D09.18 on Solid Insulations, Non-Metallic Shieldings, and Coverings for Electrical and Telecommunications Wires and Cables.
Current edition approved March 10, 2002.Nov. 1, 2008. Published June 2002.December 2008. Originally published as D4245–83.approved in 1983. Last previous edition
D4245–97.approved in 2002 as D4245–02.
2
ForreferencedASTMstandards,visittheASTMwebsite,www.astm.org,[e-mail] Annual Book of ASTM Standards
, Vol 10.01.volume information, refer to the standard’s Document Summary page on the ASTM website.
*ASummary of Changes section appears at the end of this standard.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1

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D4245–08
TABLE 1 Requirements for Physical Properties
Unaged Requirements:
Tensile strength, min, psi (MPa) 1000 (6.9)
Elongation at rupture, min, % 300
Aged Requirements:
After air-oven test at 121 6 1°C for 168 h:
Tensile strength and elongation at rupture, min, % of 75
unaged value
Heat Distortion (At 150 6 1 °C, max, % of unaged value):
2
4/0 AWG (107 mm )
...