Electrical Sources in Hazardous Locations Electrical fires can be reduced by using the proper electrical installations and the proper equipment. Hazardous locations require specially designed electrical equipment to protect people and property against increased fire potential. Certain electrical components and instruments are engineered specifically for locations designated as hazardous due to the possible presence of ignitable quantities of flammable liquids, gases, vapors, combustible dust or ignitable fibers. Hazardous locations are classified as Class I, Class II, or Class III. The class is dependent on the physical properties of the combustible materials that may be expected to be present. Class I locations are those...