• Example: A Fire Extinguisher with a rating of 2A would contain the equivalent to 2.5 gallons of water (2 x 1.25) Class B: Flammable Liquids-Gasoline, oil, grease, acetone (includes flammable gases). … (1 x 1.25) and would be able to extinguish 10 square feet of a class B fire. (The extinguisher would also be rated non-conductive due to …
The numbers indicate the size rating of each extinguishing agent. Here’s how it works: The Class A size rating represents the water equivalency. Each number represents 1 ¼ gallons of water. For instance, 2A means the extinguisher is just as effective as 2 ½ gallons of water. 4A is equivalent to 5 gallons of water.
Need Help Understanding Fire Extinguisher Ratings? – Angi
5. Foam Fire Extinguisher: The foam in this extinguisher works best on class A and B fires, but it’s not suitable for gaseous fires. The foam blankets the fire, which prevents vapors from rising and cools the surface. 6. …
Fire Extinguisher Ratings 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. What size fire extinguisher is required? Light Fire Hazard For Class A hazards, each extinguisher must be 2A or larger with a …
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How are fire extinguishers rated?
All Fire Extinguishers are tested by the Underwriters Laboratory for safety and performance. They are rated based on the type of fire that they will put out, and their classification is determined by the size of fire they will put out.
What is the difference between 1A and 2A fire extinguishers?
A higher number means the extinguisher can battle a bigger blaze. A fire extinguisher with a 1A rating is equivalent to 1.25 gallons of water. A 2A rating equals 2.5 gallons of water and a 4A rating equals 5 gallons of water. B-rated fire extinguishers are numbered in 10s.
What does class a mean on a fire extinguisher?
Here’s how it works: The Class A size rating represents the water equivalency. Each number represents 1 ¼ gallons of water. For instance, 2A means the extinguisher is just as effective as 2 ½ gallons of water. 4A is equivalent to 5 gallons of water.
Can you use an ABC extinguisher on electrical fires?
An ABC extinguisher uses a fine powder to suffocate a fire and prevent reignition. This extinguisher will put out the most common home fires and is safe to use on electrical fires. The National Fire Protection Association recommends only attempting to put out fires in a small, confined area.
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Extingushers for Cindy. City of St. Thomas Fire Department – Fire Extinguisher Training Video Answer
Reference:
https://www.usfa.fema.gov/
https://en.wikipedia.org/wiki/Fire_extinguisher