1.1 本规范涵盖了主要由聚乙烯组成的热塑性绝缘材料。 1.2 这种绝缘材料适用于导线温度高达75°C、最大导线尺寸为1000 kcmil（507 mm）的连续运行的导线或电缆 2. ). 最大额定电压不得超过35 000 V用于电源应用或9 000 V用于串联照明。 1.3 在许多情况下，除非绝缘材料在导体周围形成，否则无法对其进行测试。因此，本规范中对绝缘电线或电缆进行的测试仅用于确定绝缘材料的相关特性，而不是测试绝缘导线或完整电缆。 1.4 当以不同单位表示两组值时，第一组中的值被视为标准值，而括号中的值仅供参考，不被视为标准值。 1.5 本国际标准是根据世界贸易组织技术性贸易壁垒（TBT）委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认标准化原则制定的。

1.1 This specification covers a thermoplastic insulation which consists substantially of polyethylene. 1.2 This type of insulation is considered suitable for use on wire or cable that will be used for continuous operation at conductor temperatures up to 75 °C with a maximum conductor size of 1000 kcmil (507 mm 2 ). The maximum voltage rating shall not exceed 35 000 V for power application or 9 000 V for series lighting. 1.3 In many instances the insulation material cannot be tested unless it has been formed around a conductor. Therefore, tests done on insulated wire or cable in this specification are solely to determine the relevant property of the insulation material and not to test the insulated conductor or completed cable. 1.4 Whenever two sets of values are stated, in different units, the values in the first set are regarded as standard, while the values in parentheses 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.