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 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.
1.4 Whenever two sets of values are presented, in different units, the values in the first set are to be regarded as standard. The values given in parentheses are mathematical conversions that are provided for information only and are not considered standard.
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.