Electrical or electronic equipment designed to be explosion proof (ex-proof) extrinsically provides protection from hostile atmospheric conditions or explosion. Designing ex-proof or intrinsically safe components is crucial for any industry operating under harsh environmental conditions. The ex-proof design specifications can comply to different classes of protection proposed by standards. Different ex-proof models are purposely build for various industrial requirements. The modular designs are based on tough cabinets and enclosures, insulation, rack mounts and so on. Ex-proof products are ubiquitous in a wide range of industries such as oil & gas, mining, naval, military, transportation and telecommunications.