How Is an ABC Fire Extinguisher Designed? The ABC fire extinguishers are multipurpose and use a dry chemical called monoammonium phosphate to put out A, B, and C fires which are described as follows: Class A flames are caused by wood, cloth, or paper. Class B flames are caused by liquids and gases.
In addition to the above fire extinguisher types, there is also a combination ABC fire extinguisher, available for multipurpose use, which covers types A, B and C fires. This type of extinguisher works well in home applications where different types of fires can break out.
What do the A B C ratings mean on Fire Extinguishers?
Fire Extinguisher Ratings. Fire extinguishers are classified by fire type. The A, B, C rating system defines the kinds of burning materials each fire extinguisher is designed to fight. The number in front of the A, B, or C indicates the rating size of fire the unit can extinguish.
There are 5 different Fire Classes and extinguishers are labeled to meet these individual classes. Fire Extinguisher Classes Include: Class A: Ordinary Combustibles like Wood, Paper and Cloth. Class B: Flammable Liquids like Grease, Oil, Paint and Solvents. Class C: Live Electrical Equipment like Electrical Panels, Motors and Wiring.
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What chemicals are used in a Class B fire extinguisher?
The primary chemical used to fight these fires is monoammonium phosphate, because of its ability to smother fires in these types of materials. Fire extinguishers with a Class B rating are effective against flammable liquid fires. These can be fires where cooking liquids, oil, gasoline, kerosene, or paint have become ignited.
What is a Class C fire extinguisher?
Generally, fire extinguishers with a Class C rating are suitable for ‘live’ electrical equipment. Class C fires involve electronic equipment like servers, motors, transformers, computers, and appliances.
What is an ABC fire extinguisher?
The dry chemical in an ABC fire extinguisher puts out multiple fire sources: grease, oil, wood, clothes, papers, liquids, gases and energized electrical sources. The only downside is that the ABC extinguisher leaves a heavy residue that gets into the nooks and crannies of the kitchen appliances and is hard to clean up afterward.
What are the different types of fire extinguishers?
Fire extinguishers with a Class A rating are effective against fires involving paper, wood, textiles, and plastics. The primary chemical used to fight these fires is monoammonium phosphate, because of its ability to smother fires in these types of materials. Fire extinguishers with a Class B rating are effective against flammable liquid fires.
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TYPES OF FIRE AND FIRE EXTINGUISHERS | WHICH FIRE EXTINGUISHER TO BE USED ON WHICH CLASSES OF FIRE Video Answer
Reference:
https://www.usfa.fema.gov/
https://en.wikipedia.org/wiki/Fire_extinguisher