ASTM D4246-02(2010)
(Specification)Standard Specification for Ozone-Resistant Thermoplastic Elastomer Insulation For Wire and Cable, 90°C Operation
Standard Specification for Ozone-Resistant Thermoplastic Elastomer Insulation For Wire and Cable, 90°C Operation
ABSTRACT
This specification covers an ozone-resistant thermoplastic elastomer insulation for electrical wire and cables. This type of insulation is considered to be suitable for continuous operation at the specified conductor temperatures and operating voltages in dry locations. The minimum installation temperature is specified. Tests shall be done on insulated wire or cable solely to determine the relevant property of the insulation material and not to test the conductor or completed cable. The insulation shall conform to the prescribed physical property requirements such as (1) tensile strength and elongation at rupture before and after air oven aging test, (2) heat distortion, and (3) thickness. AC voltage, insulation resistance, and DC voltage tests shall be performed in that order when any of these tests are specified for electrical requirements. The insulation shall not show any cracks when tested by cold bend test and shall show no cracking or surface checking after exposure to the prescribed ozone concentration.
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 considered suitable for continuous operation at conductor temperatures not exceeding 90 °C in dry 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 specification solely to determine the relevant property of the insulation material and not to test the conductor or completed cable.
General Information
Relations
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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:D4246 −02(Reapproved 2010)
Standard Specification for
Ozone-Resistant Thermoplastic Elastomer Insulation For
Wire and Cable, 90 °C Operation
This standard is issued under the fixed designation D4246; 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 (act of), n—the exposure of materials to air at
1.1 This specification covers an ozone-resistant insulating
121 °C for 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 considered suitable for con-
1.
tinuous operation at conductor temperatures not exceeding 90
°C in dry locations. Operating voltages are not to exceed 2000
4.2 Thickness of Insulation—Table 1(a), (Conductor Sizes,
V. The minimum installation temperature is−40 °C.
Insulation Thicknesses, and AC Test Voltages for Rubber
Insulations) of Test Methods D470 lists the minimum average
1.3 Whenever two sets of values are presented, in different
thickness for the insulation. The required minimum thickness
units, the values in the first set are the standard, while those in
is 90% of the specified average thickness.
parentheses are for information only.
1.4 In many instances the insulation material cannot be
5. Electrical Requirements
tested unless it has been formed around a conductor or cable.
5.1 Order of Testing—Perform the ac voltage, insulation
Therefore, tests are done on insulated wire or cable in this
resistance, and dc voltage tests in that order when any of these
specification solely to determine the relevant property of the
tests are specified. The sequence of other testing is not
insulation material and not to test the conductor or completed
specified.
cable.
5.2 AC Voltage Test—Unless otherwise specified, omit this
2. Referenced Documents
test if the dc voltage test described in 5.4 is to be performed.
Test each insulated conductor for 5 min at the ac voltage given
2.1 ASTM Standards:
in Table 1(a) (Conductor Sizes, Insulation Thicknesses, and
D470Test Methods for Crosslinked Insulations and Jackets
AC Test Voltages, for Rubber Insulations) of Methods D470
for Wire and Cable
under the columns labelled “Ozone-Resisting Insulations.”
D1711Terminology Relating to Electrical Insulation
D2633Test Methods for Thermoplastic Insulations and
5.3 Insulation Resistance—The insulated conductor shall
Jackets for Wire and Cable
have an insulation resistance value of at least that correspond-
ing to a constant of 10 000 at 60 °F (15.6 °C).
3. Terminology
5.3.1 If the water temperature at the time measurement was
made differs from 60 °F (15.6 °C), correct the insulation
3.1 Definitions: For definitions of terms used in this speci-
fication refer to Terminology D1711. resistance to 60 °F. Table 2, (Temperature Correction Factors
for Insulation Resistance at 60 °F) of Test Methods D470
contains the correction factors. Each insulation manufacturer
1 can furnish the 1°F coefficient for the insulation material by
This specification is under the jurisdiction of ASTM Committee D09 on
Electrical and Electronic Insulating Materials and is the direct responsibility of
using the procedure given in Test Methods D470. Multiply the
SubcommitteeD09.18onSolidInsulations,Non-MetallicShieldingsandCoverings
measuredvaluebythecorrectionfactortoobtaintheinsulation
for Electrical and Telecommunication Wires and Cables.
resistance value corrected to 60°F.
Current edition approved March 1, 2010. Published August 2010. Originally
5.3.2 If the insulated conductor is covered with a non-
approved in 1983. Last prev
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.