Electrical apparatus for potentially explosive atmospheres - General requirements

This European Standard contains the General Requirements for the construction and testing of electrical apparatus for use in potentially explosive atmospheres in order to ensure that such apparatus will not cause an explosion of the surrounding atmosphere. It is supplemented or modified by the following European Standards, concerning the specific standard types of protection: EN 50015, EN 50 016, EN 50 017, EN 50 018, EN 50 019, EN 50 020. The above European Standards and this European Standard are not applicable to the construction of electro-medical apparatus, exploders, test devices for exploders and for shotfiring circuits. Devices in which, according to the manufacturer's specifications, none of the values 1.2 V, 0.1 A, 20mJ or 25mW is exceeded need not be certified or marked