1.1 本规范涵盖用作架空电导体的钢支撑（ACSS）圆线同心绞合铝导体（参见说明 注1 ). 1.2 以英寸磅或国际单位制表示的数值应单独视为标准值。每个系统应独立使用。组合两个系统的值可能会导致不符合规范。对于AWG或kcmil尺寸指定的导体尺寸，SI单位的要求从英寸-磅单位的相应要求进行数字转换。对于AWG或kcmil指定的导体尺寸，SI单位的要求已从以英寸-磅单位表示或导出的相应值进行了数字转换。 对于仅由SI单位指定的导体尺寸，要求以SI单位表示或导出。 1.2.1 对于密度、电阻率和温度，以SI单位表示的值应视为标准值。 1.3 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《国际标准、指南和建议制定原则决定》中确立的国际公认标准化原则制定的。

1.1 This specification covers round wire concentric-lay-stranded aluminum conductors, steel supported (ACSS) for use as overhead electrical conductors (see Explanatory Note 1 ). 1.2 The values stated in inch-pound or SI units are to be regarded separately as standard. Each system shall be used independently of the other. Combining values from the two systems may result in nonconformance with the specification. For conductor sizes designated by AWG or kcmil sizes, the requirements in SI units are numerically converted from the corresponding requirements in inch-pound units. For conductor sizes designation by AWG or kcmil, the requirements in SI units have been numerically converted from corresponding values stated or derived in inch-pound units. For conductor sizes designated by SI units only, the requirements are stated or derived in SI units. 1.2.1 For density, resistivity and temperature, the values stated in SI units are to be regarded as standard. 1.3 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.