1.1 本规范涵盖了用于电气设备的镀银软或退火圆铜线，如下所示: 1.1.1 A类- 银涂层至少占涂覆导线总重量的1.25%的导线。 1.1.2 B类- 银涂层至少占涂覆导线总重量的2.50%的导线。 1.1.3 C类- 银涂层至少占涂覆导线总重量的4.00%的导线。 1.1.4 D类- 银涂层至少占涂覆导线总重量的6.10%的导线。 1.1.5 E级- 银涂层至少占涂覆导线总重量的10.00%的导线。 1.2 通过制造商和购买者之间的相互协议，可以获得具有不同重量百分比的银的镀银线。出于信息目的，由上面列出的百分比提供的以微英寸为单位的涂层厚度显示在 表1 （解释性 附注1 ). 1.3 以英寸-磅单位表示的值应被视为标准值。括号中给出的值是对SI单位的数学转换，仅供参考，不被视为标准。 1.3.1 例外情况- 密度、电阻率和体积的SI值应被视为标准值。 1.4 本标准并不旨在解决与其使用相关的所有安全性问题（如果有）。本标准的使用者有责任在使用前建立适当的安全、健康和环境实践并确定法规限制的适用性。 有关具体的预防声明，请参见 8.4.1.2 和解释性的 附注2 . 1.5 本国际标准是根据世界贸易组织发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认的标准化原则制定的技术性贸易壁垒委员会。

1.1 This specification covers silver-coated, soft or annealed, round copper wire, intended for use in electrical equipment, as follows: 1.1.1 Class A— Wire whose silver coating is at least 1.25 % of the total weight of the coated wire. 1.1.2 Class B— Wire whose silver coating is at least 2.50 % of the total weight of the coated wire. 1.1.3 Class C— Wire whose silver coating is at least 4.00 % of the total weight of the coated wire. 1.1.4 Class D— Wire whose silver coating is at least 6.10 % of the total weight of the coated wire. 1.1.5 Class E— Wire whose silver coating is at least 10.00 % of the total weight of the coated wire. 1.2 Silver-coated wire having different minimum percentages of silver by weight may be obtained by mutual agreement between the manufacturer and the purchaser. For information purposes the thickness of coating in microinches provided by the percentages listed above is shown in Table 1 (Explanatory Note 1 ). 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. 1.3.1 Exceptions— The SI values for density, resistivity, and volume are to be regarded as standard. 1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. For specific precautionary statements see 8.4.1.2 and Explanatory Note 2 . 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.