Explosion Proof Distribution Box & Electrical Enclosures are certified for Class I, Division 1 and Class II, Division 1. You need to check if the enclosure fits the danger level and protection type. For example, you might need Ex d for flameproof or Ex i for safe designs. In this article, we will explore three key aspects:. What are the standards for the methods of protection for electrical equipment? The following, although not exhaustive, is a list of the standards applicable to the selection, installation, maintenance and repair of electrical equipment: BS EN 60079 Explosive atmospheres. General. From oil & gas refineries to chemical plants, power generation facilities, and offshore platforms, explosion proof enclosures and certified ex equipment play a vital role in protecting people, assets, and operations. We give you an overview of the most important regulations and. In 1753 the first lightning conductor was invented, enabling electro-static discharges as the sources of ignition for fires to be significantly reduced. Lamps in mining also constituted another high fire risk for many years, because mine air mixed with methane – so-called firedamp – was able to.