Crouse-Hinds series BHR and SRD interlocked receptacles are used to supply power to portable electrical equipment, such as motor generator sets, compressors, heating and cooling units, lighting systems and conveyors. They are used in areas which are hazardous due to the presence of flammable vapors or gases and combustible dusts. Ideal for petroleum refineries, chemical and petrochemical plants, and grain processing and handling facilities.