4. 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. The foam blankets the fire, …
The numerical rating for a Class A Fire extinguisher refers to the amount of chemicals/agent in the extinguisher. The number represents the chemical/agent’s equivalent to gallons of water the extinguisher holds. Multiply the number in front of A by 1.25 to …
Understanding Fire Extinguisher Ratings – HSEWatch
Fire Extinguisher Ratings. Fire extinguishers are classified by fire type. 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).
Also, the codes can tell you how effective the extinguisher is relative to other fire extinguishing apparatus. Here’s the breakdown: Class A size ratings discusses Water equivalency. So on the code the first number is 3A. Each number on that code represents 1 ¼ gallons of water. So above, our extinguisher is as good as 3 ¾ gallons of water.
People Also Ask a rating fire extinguisher
How are fire extinguishers rated?
All Fire Extinguishers are tested by the Underwriters Laboratory for safety and performance. They are rated based on the type of fire that they will put out, and their classification is determined by the size of fire they will put out.
What does 4A mean on a fire extinguisher?
– The A rating is a water equivalency rating. Each A is equivalent to 1 1/4 gallons of water. 4A = 5 gallons of water. – The B:C rating is equivalent to the amount of square footage that the extinguisher can cover, handled by a professional.
What is the difference between 1A and 2A fire extinguishers?
A higher number means the extinguisher can battle a bigger blaze. A fire extinguisher with a 1A rating is equivalent to 1.25 gallons of water. A 2A rating equals 2.5 gallons of water and a 4A rating equals 5 gallons of water. B-rated fire extinguishers are numbered in 10s.
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.
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Fire Extinguisher Ratings Video Answer
Reference:
https://www.usfa.fema.gov/
https://en.wikipedia.org/wiki/Fire_extinguisher