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. …
Located on the fire extinguisher label is the UL rating (Fire Extinguisher Ratings). The UL rating is broken down into Class A and Class B:C ratings. … For example: An extinguisher that is rated 4A:20B:C indicates the following: – The A rating is a water equivalency rating. Each A is equivalent to 1 1/4 gallons of water. 4A = 5 gallons of …
UL Rating Guide for Fire Extinguishers – How to choose a …
Class K Fire extinguishers are have been rated to be used on Kitchen fires involving cooking oils and deep fryers. Class K are not given a numerical rating. • Example: A Fire Extinguisher with a rating of 2A:K would contain the equivalent to 2.5 gallons of water (2 x 1.25) and would also be approved to be used on a Class K (cooking oil) Fire.
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. The Class B size rating indicates the square footage the extinguisher can cover. 20B means that as long as you …
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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 does 4A mean on a fire extinguisher?
– The A rating is a water equivalency rating. Each A is equivalent to 1 1/4 gallons of water. 4A = 5 gallons of water. – The B:C rating is equivalent to the amount of square footage that the extinguisher can cover, handled by a professional.
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.
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.
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Fire Extinguisher UL Rating & Placement as per NFPA 10 Part 1 English Video Answer
Reference:
https://www.usfa.fema.gov/
https://en.wikipedia.org/wiki/Fire_extinguisher