A Hazardous Area is an area where a flammable gas-air mixture or dust-air mixture is present for at least a short time under normal atmospheric conditions. This includes facilities where flammable gases, substances and liquids are transported, stored or processed, as for example: Oil and gas industry, cement plants, chemical industry or paint manufacturers. The above-mentioned facilities therefore require electrical equipment that can be operated safely even in the presence of an explosive atmosphere. For this to be achieved, the electrical equipment must be designed, manufactured, installed and operated in accordance with explosion protection requirements.