Fire Extinguisher An extinguisher with an ABC rating is suitable for use with fires involving ordinary combustibles, flammable liquids and energized electrical equipment. An extinguisher that is rated for use with multiple hazards should include a symbol for each hazard type. Class A: Identified with a green triangle, this class of fire is related to combustible wood, paper, trash, etc. Class B: Identified with a red square, this class of fire is related to combustible liquids and fuels, such as gas, diesel, kerosene, etc. Class C: Identified with a blue circle, this class of fire is used to identify any fire with an electrical hazard. Class D: Identified with a yellow star, this class of fire is identified with combustible metals, such as magnesium. Class K: Identified with a black hexagon, this class of fire relates to flammable kitchen fuels, such as cooking oil and grease. Call Us - 08042781631