The A, B, C rating system defines the kinds of burning materials each fire extinguisher is designed to fight. The number in front of the A, B, or C indicates the rating size of fire the unit can extinguish. 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 …
The rating of a fire extinguisher is designed to help users understand the class and size of a fire in which the extinguisher is meant to be used. Only two classifications of fire include a number with the rating, Class A and B. This number has a different meaning for each class. For Class A, the rating is to help measure how many gallons of …
What Do the Numbers Mean On a Fire Extinguisher?
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 …
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. Clean Agent Fire Extinguisher: This fire extinguisher is best suited for Class B and C fires.
People Also Ask what does fire extinguisher rating of 20a 120b c mean
What do the ratings on a fire extinguisher mean?
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. These numerical ratings allow you to compare the relative extinguishing effectiveness of various fire extinguishers.
What is a 20B C fire extinguisher rating?
– The B:C rating is equivalent to the amount of square footage that the extinguisher can cover, handled by a professional. 20B:C = 20 square feet of coverage. – C indicates it is suitable for use on electrically energized equipment. When analyzing these ratings, note there is not a numerical rating for Class C or Class D fires.
What do the numbers on a fire extinguisher mean?
These numerical ratings allow you to compare the relative extinguishing effectiveness of various fire extinguishers. 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 water.
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.
People Also Searches what does fire extinguisher rating of 20a 120b c mean
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