Classifications of Fire:
There are 3 basic classes of fires. All fire extinguishers are labeled with standard symbols for the classes of fires they can put out. The classes are at the right.
Many household fire extinguishers are "multipurpose" A-B-C models. In other words, they can be used on all 3 classes of fire. For example, if you are faced with a Class A fire, and you don't have an extinguisher with an "A" symbol, don't hesitate to use one with the B:C symbols.
Class "D" fire extinguishers are mainly used in industrial settings. These are used to put out combustible metals.
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Class A: Wood, paper and other
combustible solids Ordinary combustibles such as wood, cloth, and paper. |
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Class B: Fuel, Oil, and other
combustible liquids Flammable liquids such as gasoline, oil, and oil-based paint. |
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Class C: Electrical Energized electrical equipment including wiring, fuse boxes, circuit breakers, machinery, and appliances. |
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Class D: Combustible Metals Combustible metals such as Magnesium, Sodium, or Potassium. |
WARNING!
It is dangerous to use water or an extinguisher labeled "ONLY for Class
A Fires" on a grease or electrical fire. Class "A"
extinguishers contain water. Water on a Class "B" fire will
cause it to spread and it will conduct electricity when used on a Class
"C" fire.
Installation and Maintenance
Install your fire extinguishers in plain view. Keep them out of reach of children and away from stoves and heating appliances.
Read the operator's manual to learn how to inspect and maintain your fire extinguisher. Extinguishers require routine care.
Rechargeable extinguishers must be serviced after every use. There is a list of service companies in the yellow pages. Disposable fire extinguishers can only be used once. Replace disposable extinguishers after use.
Before Fighting the Fire
Before you fight the fire, make sure that...
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Everyone has left, or is leaving,
the building, and that the fire department has been called. |
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The fire is confined to a small area and is not spreading. |
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You have an unobstructed escape route to which the fire will not spread. |
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The extinguisher is the right type for the fire. |
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You have read the instructions and that you know how to use the extinguisher. |
Instructions
Keep your back to an unobstructed exit and
stand 6 to 8 feet away from the fire. Follow this 4 step procedure.
Remember the PASS word
Pull the pin. This unlocks the operating ever and allows you to discharge the extinguisher. Some extinguishers may have a different release device.
Aim low: Point the extinguisher at the base of the fire with the nozzle or hose.
Squeeze the lever above the handle: This will discharge the extinguisher's contents. To stop the discharge, release the lever. Some extinguishers may have a button instead of a lever.
Sweep from side to side: Aim and keep the extinguisher at the base of the fire and sweep back and forth until the flames appear to be out. While doing this, move carefully toward the fire. Repeat the process if the fire reignites.
