Weighing equipment used in areas where there may be explosive concentrations of vapors or dust must be equipped with special wiring and other intrinsically safe electrical components. Hazardous (classified) locations might exist in any manufacturing location with vapors, dust or flyings, but are common in large bakeries (flour), plastics manufacturing plants (vapors or dust), chemical plants (vapors), paint-finishing locations (vapors), and grain silos (dust or flyings), to name just a few. Other examples include locations where vehicles are fueled or any transfer mechanisms for inherently hazardous materials.