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Fire Extinguisher Information

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Fire Extinguishers

 

Ratings

Old Symbol - Ordinary Combustibles

CLASS A

Class A extinguishers will put out fires in ordinary combustibles, such as wood and paper. The ratings refer to the amount of water they hold, and therefore the amount of fire that they will put out.		 New Symbol - Ordinary Combustibles
Old Symbol - Flammable Liquids

CLASS B

Class B extinguishers are suitable for use on flammable liquids, such as grease, gasoline, oil, etc. Ratings refer to the approximate amount of fire that a non-expert operator can extinguish.		 New Symbol - Flammable Liquids
Old Symbol - Electrical Equipment

CLASS C

Class C extinguishers are suitable for use on electrically energized fires. This rating simply means that the extinguishing agent is non-conductive.		 New Symbol - Electrical Equipment
Combustible Metals

CLASS D

Class D extinguishers are designed for use on flammable metals, and are often specific for the type of metal in question. These extinguishers generally have no rating, and are not given a multi-purpose rating for use on other types of fires.		 There is no picture designator
for Combustible Metals.

 

 

 

              MULTI-CLASS RATINGS

Many extinguishers available today are suitable for use on different types of fires, and so 
will be labeled A-B, B-C, or A-B-C. Every extinguisher of this type must be clearly labeled, and if it is not, insist that the proper label be applied.		  

 

Old Style - Class ABC   This is the old style of labeling, designating suitability on Class A, B, and C fires.
New Style - All Classes EXCEPT Metals   This is the new designation, showing that this extinguisher would be suitable for use on Ordinary Combustibles, Flammable Liquids, and Electrical Equipment.
New Style - Ordinary Combustibles and Flammable Liquids
   The new system draws a diagonal red line across the type of fire that the extinguisher is NOT designed for. Therefore, this example would be found on an extinguisher suitable for use on Ordinary Combustibles 
and Flammable Liquids, but not Electrical Equipment.