1.1 本规范涵盖电气用裸硬拉圆包铜钢丝( 注1 ). 注1: 根据本规范订购的电线不用于重新绘制。如果需要使用电线，请咨询制造商。 1.2 规定了四个等级的导线，指定如下( 注释2 ):40级HS、40级EHS、30级HS和30级EHS。 注2: 本规范涵盖的等级对应于以下商业名称: 等级40 HS ，高强度，40 % 电导率。 40级EHS ，超高强度，40 % 电导率 30级HS ，高强度，30 % 电导率。 30级EHS ，超高强度，30 % 电导率。 1.3 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。

1.1 This specification covers bare hard-drawn round copper-clad steel wire for electrical purposes ( Note 1 ). Note 1: Wire ordered to this specification is not intended for redrawing. If wire is desired for this purpose, consult the manufacturer. 1.2 Four grades of wire are specified, designated as follows ( Note 2 ): Grade 40 HS, Grade 40 EHS, Grade 30 HS, and Grade 30 EHS. Note 2: The grades covered by this specification correspond to the following commercial designations: Grade 40 HS , High Strength, 40 % Conductivity. Grade 40 EHS , Extra High Strength, 40 % Conductivity Grade 30 HS , High Strength, 30 % Conductivity. Grade 30 EHS , Extra High Strength, 30 % Conductivity. 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.