Suitable for class "b" "c" & "a" "b" "c" fires Burning solid such as oil, Petrol kerosene & burning gases such as butane, chloride & natural propane, vinyl chloride & natural gases. Live electrical equipment. Dry powder type fire extinguishers are highly effective for b & c Class fires, specially for combating three dimensional or running fires Involving inflammable liquids like petrol, paints, solvents or industrial Gases. They can also be used on energised electrical equipments. Powder based extinguisher knocks down fire by beating & displacement of air.