IEC 60664-3:20 16(E)可作为IEC 60664-3:20 16获得 包含国际标准及其红线的RLV 版本，显示技术内容与 上一版。 IEC 60664-3:20 16适用于通过使用涂层、灌封或模制来防止污染的组件，从而允许减少IEC 60664-1中所述的间隙和爬电距离。本文件描述了两种保护方法的要求和测试程序: -1型保护改善了被保护部位的微环境； -2型保护被认为类似于固体绝缘。与上一版相比，此版本包括以下重大技术变更: a)添加的关于插值的信息；b)提供的划痕测试仅用于2类保护； c)将划痕测试重新编号以跟随目视检查测试，因为它在那里更有意义； d)将现在称为附件A的表格分开，使其更加清晰。 根据IEC指南104，它具有水平标准的地位

IEC 60664-3:2016(E) is available as IEC 60664-3:2016 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.

IEC 60664-3:2016 applies to assemblies protected against pollution by the use of coating, potting or moulding, thus allowing a reduction of clearance and creepage distances as described in IEC 60664-1. This document describes the requirements and test procedures for two methods of protection:
- type 1 protection improves the microenvironment of the parts under the protection;
- type 2 protection is considered to be similar to solid insulation. This edition includes the following significant technical changes with respect to the previous edition:
a) information added concerning interpolation;
b) provided scratch test is only for type 2 protection;
c) renumbered the scratch test to follow the visual examination test, since it makes more sense there;
d) separated the tables under what is now called Annex A, to make them clearer.
It has the status of a horizontal standard in accordance with IEC Guide 104