If an extinguisher has a Class C rating, it means that the agent will not conduct electricity. But it is always best to disconnect the power source prior to fighting the fire. A Class C fire extinguisher is used to extinguish a fire that …
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Guide to Fire Extinguisher Sizes, Types, & Ratings
Water-Based Fire Extinguishers. Water extinguishers combat Class A fires; water mist extinguishers fight both Class A and C fires. Water serves as the …
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. To achieve a Class “A” rating, the extinguisher must be capable of putting out the wood crib, wood panel and excelsior (shredded …
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Why are Class C fire extinguishers used on Class C fires?
The reason these can be used on Class C fires is because the extinguisher used de-ionized water which does not conduct electricity. Also, the water is expressed as a mist and not a stream which enhances the cooling and soaking characteristics and reduces scattering of burning materials.
Why choose a different fire extinguisher for each application?
Fire extinguishers are uniquely designed to meet the needs of a variety of applications, so it’s important to choose the one that’s right for you. For example, a different extinguisher may be needed for a commercial kitchen as opposed to a clean room or library.
What does 4A mean on a fire extinguisher?
One A is equivalent to 1.25 gallons of water, so a unit with a 4A rating has an equivalent of 5 gallons of water to battle Class A fires. B: The number in front of the "B" is a relative measure of the area an extinguisher can cover.
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.
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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