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.
Fire Extinguisher Sizes. The size of a fire extinguisher indicates the amount of extinguishing agent it holds and is most often measured in pounds. Sizes can range from as small as 2.5 lb. to as large as 350 lb. While the largest extinguishers will come with built-in wheels to make transportation manageable, size is always important to consider.
Fire extinguisher colour codes: what do they mean?
Understanding fire extinguisher colour codes is crucial to safety and wellbeing. It can mean the difference between effectively putting out a fire and causing further damage to property and potential harm to people. You can find the colour code of your fire extinguisher on the band around the canister. The different colour codes are as follows:
Water Mist Fire Extinguisher: This extinguisher works on most fire classes by releasing tiny water molecules to suffocate the fire and cool temperatures. The water in this fire is safe to use on electrical fires. 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.
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What does 4A 20B C mean on a fire extinguisher?
You might come across a fire extinguisher labeled 4A:20B:C. The numbers indicate the size rating of each extinguishing agent. Here’s how it works: The Class A size rating represents the water equivalency.
What do the fire extinguisher ratings C and k mean?
C & K: These letters indicate that an extinguisher can be used effectively against these fire classes. In practical terms, that means that if Fire Extinguisher 1 has a 4-A:80-B:C rating and Fire Extinguisher 2 has a 1-A:10-B:C rating, Fire Extinguisher 1 is…
What do the numbers on a fire extinguisher mean?
Since Class A, B, and C fires are all found in conventional homes and businesses, ABC fire extinguishers are designed to put out all three types of fires. You might come across a fire extinguisher labeled 4A:20B:C. The numbers indicate the size rating of each extinguishing agent.
Why is understanding fire extinguisher colour codes so important?
Where combustible materials vary in your facility or workplace, so should the contents of your fire extinguishers. Understanding fire extinguisher colour codes is crucial to safety and wellbeing. It can mean the difference between effectively putting out a fire and causing further damage to property and potential harm to people.
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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