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.
A number next to an A on a fire extinguisher relates the contents of the extinguisher to an equivalent amount of water. Each number equals 1.25 gallons of water. So a "1" next to the A means the extinguisher has the equivalent of 1.25 gallons of water, a "2" equals 2.5 gallons and so on.
What Does the Number on a Fire Extinguisher Mean?
The number 1 before a “B” indicates that the fire extinguisher has one square foot of firefighting power. It’s simple enough. But it’s safe to say that most people don’t assess fires in terms of the gallons of water needed to put it out.
Class B fire extinguishers have a slightly different numerical assignation. The number attached to these indicates how many feet of coverage the fire extinguisher can provide if swept back and forth. For example, a 15B extinguisher means that 15 feet of spray can be laid down. These can be combined on multi-class extinguishers.
People Also Ask what is the number on a fire extinguisher
What does the number on the fire extinguisher mean?
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.
What does the number indicate on a fire extinguisher label?
The name of the company and person who last inspected the fire extinguisher.The date of the last inspection.The license number or certification of the inspecting technician.The fire extinguisher’s chemical type. …Validation of inspection with a hole punch under “serviced.”The month and year when the last inspection was performed.
What are the names of the five fire extinguisher?
These include:Class A – a fire started with normal combustibles such as wood, paper, and cloth.Class B – a fire started with flammable and combustible liquids and gases such as gasoline and paints.Class C – a fire started by energized electrical equipment such as power transmission cables or wiring.
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What is the difference between 5BC and 10BC fire extinguisher?
What is the difference between 5BC and 10BC fire extinguisher? In our tests, the 10BC units discharged only a fraction of a second longer than the 5BC, hardly “twice” anything. The 10BC, on average, discharged only 25% more fire suppressant than the 5BC. What is the best size fire extinguisher for home use?
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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