Film-forming foam type. AFFF (aqueous film-forming foam) and FFFP (film-forming fluoroprotein) fire extinguishers are rated for use on both Class A and Class B fires. As the name implies, they discharge a foam material rather than a liquid or powder. They are not suitable for use in freezing temperatures.
There are four classes of fires: Class A: Ordinary solid combustibles such as paper, wood, cloth and some plastics. Class B: Flammable liquids such as alcohol, ether, oil, gasoline and grease, which are best extinguished by smothering. Class C: Electrical equipment, appliances and wiring in which the use or a nonconductive extinguishing agent prevents injury from electrical …
Fire Extinguisher Types | NFPA
Class C Rating: Class C extinguishers are designed to be used on fires involving live electrical equipment. Identified with the letter C inside a blue circle. Class D: Fire extinguishers with a Class D rating should be used for combustible materials and combustible metal alloys. Identified with the letter D inside of a yellow star, this is also the only class that does not have a …
People Also Ask what class of fire extinguisher is rated for electrical
What do the B C ratings mean on fire extinguishers?
Thus, a 4A will equal about five gallons of water. The numbers on a B or C rating will indicate the square footage that extinguisher can handle. The letter indicates the type of fire that the fire extinguisher can be used on. For example, a rating of 2B means that the fire extinguisher can be used to combat two square feet of a Class B fire.
What is the best fire extinguisher?
Foam extinguishers: The label colouring for this type of extinguisher is cream.Water extinguishers: The label colour for this type of fire extinguisher is bright red.Dry powder extinguishers: The label colouring for this type of fire extinguisher is blue.Wet chemical extinguishers: The label colour for this type of fire extinguisher is yellow.
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What do the ratings on a fire extinguisher mean?
what is rating of fire extinguisher? The fire rating of the particular extinguisher is indicated by a number and letter, e.g. 34B. The number indicates the size of fire it can extinguish. The size of the fires indicated are for fires put out under test conditions and the larger the number, the larger the fire it can extinguish.
What are the classifications of fire extinguishers?
Class A. Extinguishers rated for class A fires are acceptable for dealing with ordinary combustibles, including wood, paper, textiles, and some plastics. …Class B. Extinguishers marked with a square containing the letter B are acceptable to use with flammable liquid and gas fires, including oil and gasoline. …Class C. …Class D. …Class K. …
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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