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ASTM D4245-21
Standard Specification for Ozone-Resistant Thermoplastic Elastomer Insulation For Wire and Cable, 90 ?C Dry/75 ?C Wet Operation
Přeložit název
NORMA vydána dne 1.1.2021
Informace o normě:
Označení normy: ASTM D4245-21
Datum vydání normy: 1.1.2021
Kód zboží: NS-1018243
Počet stran: 3
Přibližná hmotnost: 9 g (0.02 liber)
Země: Americká technická norma
Kategorie: Technické normy ASTM
Kategorie - podobné normy:
Anotace textu normy ASTM D4245-21 :
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.
Keywords:
90 ?C dry/75 ?C wet insulation, ac voltage test, accelerated water absorption, dc voltage test, insulation, insulation resistance, ozone-resistant, thermoplastic elastomer, thermoplastic elastomer insulation,, ICS Number Code 29.035.20 (Plastic and rubber insulating materials)
Doplňující informace
| 1. Scope | ||||||
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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. 1.5?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. |
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| 2. Referenced Documents | ||||||
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