Your Extinguisher Must Fit the Fire

Class A Type A: Ordinary combustibles. Wood, cloth, paper, rubber, many plastics, and other common materials that burn easily.

These fires are extinguished by the heat absorbing effect of water or water based liquids, or by smothering the fires.

Class B Type B: Flammable liquids. Gasoline and other flammable liquids, oil, grease, tar, oil-based paint, lacquer and flammable gas.

These fires can be extinguished by excluding air, by inhibiting the release of combustible vapor or by interrupting the combustion chain reaction.

Class C Type C: Electrical Equipment. Energized electrical equipment, including wiring, fuse boxes, circuit breakers, machinery and appliances.

These are extinguished with an agent that is electrically nonconducting in order to avoid shock hazard to the user.

Class D fires are limited to combustible metals, such as magnesium. Class D fires require a smothering and heat absorbing extinguishing agent that does not react with the burning metal.

Class K fires are fires in cooking appliances that involve combustible cooking media (vegetable or animal oils and fats).

Fire Extinguisher Operation P.A.S.S.

When used properly, a portable fire extinguisher can save lives and property by putting out a small fire or containing it until the fire department arrives. Portable extinguishers, however, are not designed to fight a large or spreading fire.
Extinguisher Pull the locking pin, breaking the seal.
Extinguisher Aim nozzle or hose just in front of the base of the fire.
Extinguisher Squeeze the trigger handle all the way.
Extinguisher Sweep discharge from side to side, moving front to back, across the base of the fire.