Fire Brochure Page 3


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Prior to using a fire extinguisher it is important to know the class of fire.  There are four classes of fires, however there are only three that are common to our campus.

All fire extinguishers are labeled according to the class of fire that they are designed to extinguish.  The fire classes as defined by the NFPA are as follows:

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Class A:  Ordinary combustibles such as wood, cloth, paper and many plastics - basically common items.

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Class B:  Flammable liquids such as gasoline, oil, grease, tar, oil-based paint, lacquer and flammable gasses.

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Class C:  Energized electrical equipment - including wiring, fuse boxes, circuit breakers and appliances.

NOTE:   After the equipment has been de-energized the fire is no longer a Class C fire.

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It is very dangerous to use water or an extinguisher labeled only Class A on a Class B or Class C fire.

Many fire extinguishers are "multipurpose" [A:B:C] models, labeled for use on all three classes of fire.  If you are ever faced with a Class A fire and don't have an extinguisher with the   fire_asy.gif (997 bytes)  symbol, use one with the  fire_bc.gif (1188 bytes)  symbol.
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This page was last updated on: August 7, 2017