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 …
Fire extinguishers are classified by fire type. The A, B, C rating system defines the kinds of burning materials each fire extinguisher is …
A, B, C… K? Fire Extinguisher Ratings Explained
This is the only appropriate extinguisher to use in kitchen conundrums. Even though class "K" fires are a subset of class "B" fires, they must be treated with extra care and thus warrant a dedicated extinguisher type. The wet chemical extinguisher can discharge for up to forty seconds at a maximum effective range of ten to twenty feet.
The numerical rating for a class B fire extinguisher refers to the number of cubic feet that the Fire Extinguisher will be able to extinguish. • Example: A Fire Extinguisher with a rating of 1A:10B:C would contain agents equal to 1.25 gallons of water (1 x 1.25) and would be able to extinguish 10 square feet of a class B fire.
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What do the numbers on a Class A fire extinguisher mean?
The numerical rating for a Class A Fire extinguisher refers to the amount of chemicals/agent in the extinguisher. The number represents the chemical/agent’s equivalent to gallons of water the extinguisher holds.
What does C mean on a fire extinguisher?
When "C" is present in the classification/UL rating, it indicates that the agents in the fire extinguisher are non-conductive, meaning that you can use them on an electrical fire (meaning anything that is plugged in).
What are the different fire extinguisher ratings?
Here are some fire extinguisher ratings: 1 1-A, 2-A, 3-A, 4-A, 6-A, 10-A 2 1-B, 2-B, 5-B, 10-B, 20-B, 30-B, 40-B More …
What is a 20B C fire extinguisher rating?
– The B:C rating is equivalent to the amount of square footage that the extinguisher can cover, handled by a professional. 20B:C = 20 square feet of coverage. – C indicates it is suitable for use on electrically energized equipment. When analyzing these ratings, note there is not a numerical rating for Class C or Class D fires.
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First Alert Fire Extinguishers (Explaining Class, A, B & C Extinguisher Ratings) Video Answer
Reference:
https://www.usfa.fema.gov/
https://en.wikipedia.org/wiki/Fire_extinguisher