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Fire Extinguishers 
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- Class A extinguishers are for ordinary combustible
materials such as paper, wood, cardboard, and most plastics.
- Class B extinguishers are for flammable or
combustible liquids such as gasoline, kerosene, grease and
oil.
- Class C extinguishers are for electrical equipment,
such as appliances, wiring, circuit breakers and outlets.
Never use water to extinguish class C fires - the risk of
electrical shock is far too great!
- Class D fire extinguishers are commonly found in
chemical laboratories. They are for fires that involve
combustible metals, such as magnesium, titanium, potassium and
sodium.
- Class K fire extinguishers are for fires that
involve cooking oils, trans-fats, or fats in cooking
appliances and are typically found in restaurant and cafeteria
kitchens.
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