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.
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.
#207 – What Does the Number on a Fire Extinguisher Mean?
Letters and numbers represent the type and size of fire that an extinguisher can handle. All fires belong to one of five lettered classes: Class A: Wood, paper, and other “ordinary combustibles” Class B: Flammable liquids and gasses, excluding grease and cooking oil; Class C: Fires worsened or sustained by energized electrical equipment
The number before the A indicates the size of a wood panel that can be extinguished,. So a 1A rating would extinguish an 8 X 8 foot panel and a 2A rating would extinguish a 10 X 10 foot wood panel. Each whole number increase in the rating increases the panel dimensions by 2 feet.
People Also Ask what does the number represent on a fire extinguisher
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?
What size fire extinguisher do I need for my home?
The living room should have a 2A: 10: B: C or 5-10 pounds fire extinguisher every 40 feet.The garage with inflammable objects should have a 3A: 40B-C or 5-10 pounds fire extinguisher installed.The kitchen should have a 2.5 pounds extinguisher.
What size fire extinguisher do I need for my business?
What size fire extinguisher does my business need?Fire Risks: Be aware of the unique hazards within your operation. …Room Size and Materials: The size of a room and how it’s organized are important as well. …Employee Ability: A fire extinguisher is only as effective as the individual controlling it, so be sure that your employees can handle the one that you choose. …
What size is a 2a10bc fire extinguisher?
These numbers are a UL/ULC rating that indicates the amount of firefighting capacity with the square feet covered for the type of fire. Therefore a 2A: 10 BC extinguisher means 2.5 gallons of water (firefighting capacity) for 10 square feet covered for a BC Type fire.
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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