Fire Classifications

There are three types of common fires and two specialty classes. It is important to match the proper fire extinguisher to the size of the area you are protecting and the potential hazard. This is why fire extinguishers contain different agents and are listed for specific classes of fire. Fires are classified into five groups:
Class A Fire
Class A

Class A fires involve common combustibles such as wood, paper, cloth, rubber, trash and plastics. They are common in typical commercial and home settings, but can occur anywhere these types of materials are found. Examples include: Trash, wood, paper and cloth.
Class B Fire
Class B

Class B fires involve flammable liquids’ gases, solvents, oil, gasoline, paint, lacquers, tars and other synthetic or oil-based products. Class B fires often spread rapidly and, unless properly secured, can reflash after the flames are extinguished. Examples include: Flammable liquids, gases and solvents.
Class C Fire
Class C

Class C fires involve energized electrical equipment, such as wiring, controls, motors, data processing panels or appliances. They can be caused by a spark, power surge or short circuit and typically occur in locations that are difficult to reach and see. Examples include: Electrical Equipment.
Class D Fire
Class D

Class D fires involve combustible metals such as magnesium and sodium. Combustible metal fires are unique industrial hazards which require special dry powder agents. Examples include: Combustible Metals.
Class K Fire
Class K

Class K fires involve combustible cooking media such as oils and grease commonly found in commercial kitchens. The new cooking media formulations used for commercial food preparation require a special wet chemical extinguishing agent that is specially suited for extinguishing and suppressing these extremely hot fires that have the ability to reflash. Examples include: Combustible Cooking Media.
Copyright © 1999 Kidde Fyrnetics. All rights reserved. This information is provided “as is” and is not to be considered a warranty of product performance or as an authoritative informational page. Due to the diverse field conditions and other variables which can affect a product’s performance, Calolympic Safety disclaims all warranties (expressed and implied) as to any product’s performance or any information provided.


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