Extinguishers are classified by a number and letter symbol. The number indicates the relative size of the extinguisher, and the letter indicates the type of fire it will extinguish.
What does the letter and number indicate on a fire extinguisher?
The typical home fire extinguisher available at the home center is marked with a series of numbers and letters to indicate what type and how large of a fire the extinguisher can be used on. … The number before the B indicates the area of the liquid spill, which is burning, that the extinguisher can extinguish.
How do you read a fire extinguisher number?
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 determines the number of fire extinguishers required?
The number identifies the amount of firefighting agent that the fire extinguisher has: The greater the number, the more fire-fighting agent in the extinguisher (for example, a Class 3 fire extinguisher can put out a larger fire than a Class 2 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 do the ABC ratings mean on fire extinguishers?
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.
Fire Extinguisher Ratings.
|Rating||Pan Size (sq ft)||Gallons of Heptane|
What are the 4 types of fire extinguishers?
There are four classes of fire extinguishers – A, B, C and D – and each class can put out a different type of fire. Multipurpose extinguishers can be used on different types of fires and will be labeled with more than one class, like A-B, B-C or A-B-C.
What does 21A mean on a fire extinguisher?
Put simply, the buyer of any of our extinguishers knows that this product will not let them down when they need it most. This foam extinguisher also has a 21A fire rating, which means it has a far greater fire fighting capacity than many other 6 litre foam exintguishers (those with the standard 13A rating)
Is a dry chemical fire extinguisher the same as a Co2 fire extinguisher?
Carbon dioxide can be used on Class B & C fires. They are usually ineffective on Class A fires. Dry Chemical fire extinguishers extinguish the fire primarily by interrupting the chemical reaction of the fire triangle.
Is it a legal requirement to have fire extinguishers?
The regulations state that a minimum of two Class A fire extinguishers on every floor of a building are needed, unless the premises are very small, in which case one may be acceptable. … If there is a sprinkler or automatic suppression system in place, fewer fire extinguishers may be required.
Where should I place fire extinguishers?
The extinguishers should be placed in areas that are accessible within seconds. Place them in easy-to-grab spots, near exits. The National Fire Protection Association recommends having at least one fire extinguisher on every floor of the home. The first location should be the kitchen.
What is the OSHA standard for fire extinguishers?
NFPA recommends one 2-A fire extinguisher for every 3,000 square feet. OSHA requires employees to have access to an extinguisher within 75 feet. Employees should have access to a fire extinguisher within either 30 or 50 feet, depending on the hazard in question and the rating of the extinguisher (see below).