1.1 本规范涵盖聚氯乙烯或氯乙烯与醋酸乙烯共聚物的热塑性绝缘材料。 1.2 建议在潮湿或干燥位置的导体温度不超过60°C、电源和控制电路的最大额定电压为600 V的情况下使用这种绝缘。 1.3 在许多情况下，除非绝缘材料在导体或电缆周围形成，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，而不是测试导体或完整电缆。 1.4 以英寸-磅为单位的数值应视为标准值。 括号中给出的值是到国际单位制的数学转换，仅供参考，不被视为标准值。 1.4.1 在某些情况下（包括标题），温度仅以摄氏度表示。 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 of poly(vinyl chloride) or the copolymer of vinyl chloride and vinyl acetate. 1.2 This insulation is recommended for use at conductor temperatures not in excess of 60 °C in wet or dry locations at a maximum voltage rating of 600 V for power and control circuits. 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 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. 1.4.1 In some cases (including the title), temperatures are described in degrees Celsius only. 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.