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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.
This abstract is a brief summary of the referenced standard. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application. ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date.
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.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
D470 Test Methods for Crosslinked Insulations and Jackets for Wire and Cable
D1711 Terminology Relating to Electrical Insulation
D2633 Test Methods for Thermoplastic Insulations and Jackets for Wire and Cable
ICS Number Code 29.035.20 (Plastic and rubber insulating materials)
UNSPSC Code 26121500(Electrical wire); 26121600(Electrical cable and accessories)
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ASTM D4246-14, Standard Specification for Ozone-Resistant Thermoplastic Elastomer Insulation For Wire and Cable, 90°C Operation, ASTM International, West Conshohocken, PA, 2014, www.astm.orgBack to Top