IEC？60051-8:20 17适用于IEC 3.1.20中定义的附件？60051-1:2016. 这第五版取消并取代了1984年出版的第四版。本版构成技术修订版。 与上一版相比，此版本包括以下重大技术变更: a)根据新版IEC更新内容？60051-1和IEC？60051-9; b）增加附录A，规定检测项目的不合格分类。

IEC？60051-8:2017 applies to accessories as defined in 3.1.20 of IEC？60051-1:2016.
This fifth edition cancels and replaces the fourth edition published in 1984. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous edition:
a) updating content in line with new editions of IEC？60051-1 and IEC？60051-9;
b) addition of Annex A to specify the nonconformity classification of test items.