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 sweep the nozzle side to side, there is enough extinguishing agent inside the canister to provide 20 …
What do the Numbers on Fire Extinguishers Mean? The numbers you might see accompanying the letter class of a fire extinguisher refer to the extinguishers size rating for class A and B fires. Other classes don’t have such a rating. For class A fires, the number corresponds to its effectiveness relative to 1 ¼ gallons of water.
#207 – What Does the Number on a Fire Extinguisher …
As part of a fire extinguisher’s classification, the numbers on the label can mean either: How much water would be required to match the agent’s power against Class A fires. The square footage of Class B fires the agent can extinguish. For each A, the extinguisher contains the equivalent of 1.25 gallons of water.
Year to date made – Fire Extinguisher. The numbers you might see accompanying the letter class of a fire extinguisher refer to the extinguishers size rating for class A and B fires. Other classes don’t have such a rating. For class A fires, the number corresponds to its effectiveness relative to 1 ¼ gallons of water.
People Also Ask what does the number on a fire extinguisher represent
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.
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.
Are You fighting a fire with the wrong type of extinguisher?
Trying to fight a fire with the wrong type of extinguisher can be futile — or worse — dangerous. To distinguish between types of extinguishers, a handy alphanumeric system has been created.
What does 3A mean on a fire extinguisher?
If you see an extinguisher with “3A” that means it would be as effective as using 3 ¾ gallons of water on the fire. This helps gauge just how large a fire you can tackle.
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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