1.范围1。1本标准涵盖了在带电导体和设备上或附近工作时，用于防止触电的橡胶和橡胶状绝缘盖标准尺寸的最低要求。下文中，术语橡胶包括符合本标准的类橡胶材料。1.2本标准涵盖两种类型的盖子:I型，不耐臭氧；第二类，抗臭氧。第二类，第三类，第四类，第三类，第四类，第四类，第三类，第四类，第四类，第三类，第四类，第四类，第三类，第三类，第四类，第三类，第四类，第三类，第四类，第四类，第三类，第三类，第三类，第四类，第三类，第三类，第三类，第四类，第四类，第四类。

1. Scope1.1This Standard covers the minimum requirements for standard sizes of rubber and rubber-like insulating covers used as protec tion from electric shock while working on, or in the vicinity of, energized conductors and apparatus. Hereinafter, the term rubber includes rubber-like materials that conform to this Standard.1.2This Standard covers two types of covers designated as: Type I, non-resistant to ozone; and Type II, resistant to ozone.1.3This Standard covers five classes of covers, differing in electrical characteristics, designated as: Class 0, Class 1, Class 2, Class 3 and Class 4.1.4This Standard covers five styles of covers, differing in design characteristics, designated as: Style A, Style B, Style C, Style D and Style E.