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.
What do fire extinguisher numbers mean?
The number indicates the relative size of the extinguisher, and the letter indicates the type of fire it will extinguish. … On Type A extinguishers, the number relates to how many gallons of water the extinguisher is equal to for a Type A fire. Type B fires are of flammable liquids such as gasoline or oil.
What does the number rating on an A portable fire extinguisher signify?
Each whole number increase in the rating increases the panel dimensions by 2 feet. The number before the B indicates the area of the liquid spill, which is burning, that the extinguisher can extinguish. A 1B rating would extinguish a 2.5 square foot liquid fire and a 2B would extinguish a 5 square foot liquid fire.
What does a rating of 40 on a Class B extinguisher mean?
To qualify as a light hazard for the purpose of extinguisher election and placement, the majority of materials in the area must. be noncombustible. What does a rating of 40 on a Class B extinguisher mean. Sufficient extinguishing power for 40 square feet of burning fuel.
What does the ABC stand for on a fire extinguisher?
Dry Chemical Extinguishers come in a variety of types. You may see them labeled: • “DC” short for “dry chem” • “ABC” indicating that they are designed to extinguish class A,B,and C fires, or • “BC” indicating that they are designed to extinguish class B and C fires.
Which extinguisher is most appropriate for a Class C fire?
Powder extinguishers are a good multi-purpose fire extinguisher because they can be used on Class A, B and C fires.
What is a correct use for a portable fire extinguisher?
When using an extinguisher, use the PASS system – Pull, Aim, Squeeze, Sweep. Pull the pin on the extinguisher. Aim the extinguisher. Squeeze the trigger or top handle.
When someone asks you for a 10 lb fire extinguisher what does the 10 lbs represent?
#1 – When someone asks you for a 10 lb. fire extinguisher, what does the 10 lbs. represent? … The weight of the agent inside the 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.
Can you use fire extinguisher on electrical fire?
Fire extinguishers with a Class C rating are suitable for fires in “live” electrical equipment. Both monoammonium phosphate and sodium bicarbonate are commonly used to fight this type of fire because of their nonconductive properties.
What does 2A 10BC mean?
A fire extinguisher that is rated 2A:10 BC means it has a fire fighting capacity equivalent to: 2.5 Gallons of Water and 10 Square Feet for a BC Type Fire.