ASTM D4245-02

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 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.
1.4 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: 09-Mar-2002
• ICS: 29.035.20 - Plastics and rubber insulating materials
• Technical Committee: D09 - Electrical and Electronic Insulating Materials

Relations

• Replaces: ASTM D4245-97 - Standard Specification for Ozone-Resistant Thermoplastic Elastomer Insulation For Wire and Cable, 90&#176C Dry/75&#176C Wet Operation
• Effective Date: 10-Mar-2002
• Replaced By: ASTM D4245-08 - 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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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
An American National Standard
Designation: D 4245 – 02
Standard Specification for
Ozone-Resistant Thermoplastic Elastomer Insulation For
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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 (e) indicates an editorial change since the last revision or reapproval.
1. Scope 4. Physical Properties
1.1 This specification covers an ozone-resistant insulating 4.1 Requirements for physical properties are listed in Table
compound for electrical wire and cables 14 AWG and larger. 1.
This compound consists substantially of a thermoplastic elas- 4.2 Thickness of Insulation—Table 1(a) (Conductor Sizes,
tomer. Insulation Thicknesses, and AC Test Voltages for Rubber
1.2 This type of insulation is suitable for continuous opera- Insulations) ofTest Methods D470 lists the minimum average
tion at conductor temperatures not exceeding 90°C in dry thickness for the insulation. The required minimum thickness
locationsand75°Cinwetlocations.Operatingvoltagesarenot is 90% of the specified average thickness.
to exceed 2000 V. The minimum installation temperature
5. Electrical Requirements
is−40°C.
5.1 Order of Testing—Performtheacvoltagetest,insulation
1.3 Whenever two sets of values are presented, in different
units, the values in the first set are the standard, while those in resistance, and dc voltage tests in that order when any of these
tests are specified. The sequence of other testing is not
parentheses are for information only.
1.4 In many instances the insulation material cannot be specified.
5.2 AC Voltage Test—Unless otherwise specified, omit this
tested unless it has been formed around a conductor or cable.
Therefore, tests are done on insulated wire or cable in this test if the dc voltage test described in 5.4 is to be performed.
Test each insulated conductor for 5 min at the ac withstand
document solely to determine the relevant property of the
insulation material and not to test the conductor or completed voltage given in Table 1(a) (Conductor Sizes, Insulation
Thicknesses, and AC Test Voltages for Rubber Insulations) of
cable.
Test Methods D470 under the columns labelled “Ozone-
2. Referenced Documents
Resisting Insulation.”
2.1 ASTM Standards: 5.3 Insulation Resistance
D470 TestMethodsforCrosslinkedInsulationsandJackets 5.3.1 The insulated conductor shall have an insulation
2
for Wire and Cable resistance value of at least that corresponding to a constant of
2
D1711 Terminology Relating to Electrical Insulation 10 000 at 60°F (15.6°C).
D2633 Methods of Testing Thermoplastic Insulations and 5.3.2 If the water temperature at the time measurement was
3
Jackets for Wire and Cable made differs from 60°F (15.6°C), correct the insulation resis-
tance to 60°F. Table 2, (Temperature Correction Factors for
3. Terminology
Insulation Resistance at 60°F), of Test Methods D470, con-
3.1 Definitions: For definitions of terms used in this speci- tains the correction factors. Each insulation manufacturer can
fication refer to Terminology D1711.
furnish the 1°F coefficient for the insulation material by using
3.2 Definitions of Terms Specific to This Standard: the procedure given in Test Methods D470. Multiply the
3.2.1 aging, n—exposure of materials to air at 121°C for
measuredvaluebythecorrectionfactortoobtaintheinsulation
168 h. resistance value corrected to 60°F.
5.3.3 If the insulated conductor is covered with a non-
metallic sheath so that the insulation resistance can be mea-
1
This specification is under the jurisdiction of ASTM Committee D09 on
sured only on the completed assembly, the required insulation
Electrical and Electronic Insulating Materials and is the direct responsibility of
resistance shall be not less than 60% of that required for the
Subcommittee D09.18 on Solid Insulations, Non-Metallic Shieldings, and Cover-
ings for Electrical and Telecommunications Wires and Cables.
primary insulation based on the thickness of that insulation.
Current edition approved March 10, 2002. Published June 2002. Originally
5.4 DC Voltage Test—Unless otherwise specified, omit this
published as D4245–83. Last previous edition D4245–97.
2 test if the ac voltage test described in 5.2 has been performed.
Annual Book of ASTM Standards, Vol 10.01.
3
Annual Book of ASTM Standards, Vol 10.02. After completion of the insulation resistance test, test each
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D 4245
TABLE 1 Requirements for Physical Properties
7. Ozone
Unaged Requirements:
7.1 The insula
...