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Classes of fire abcd code#

As part of a fire extinguisher’s classification, the numbers on the label can mean either: The numbers preceding the letters on the label indicate just how much fire the extinguishing agent-the powder, gas, or other fire-fighting material–can put out. For example, an extinguisher marked “1 A:1 B: C” could extinguish Class A, Class B, and Class C fires-if it’s big enough to tackle the blaze.

The letters on a fire extinguisher’s label indicate which classes of fire it can effectively fight. For example, using a CO2 or water extinguisher on burning metal can have disastrous consequences, as the video below shows: These classes form the backbone of fire extinguisher classifications and the distinctions have important implications for firefighting.

Class K: Fats, oils, and greases used in food preparation.

Class D: Combustible metals such as magnesium.

Class C: Fires worsened or sustained by energized electrical equipment.

Class B: Flammable liquids and gasses, excluding grease and cooking oil.

Class A: Wood, paper, and other “ordinary combustibles”.

Letters and numbers represent the type and size of fire that an extinguisher can handleĪll fires belong to one of five lettered classes: If you’d like to view a selection of rated fire extinguishers now, browse our selection. We’ll cover the basics, look at a few examples, and detail the tests used to arrive at these conclusions. In this article, we explain what the numbers (and letters) on a fire extinguisher mean and what they indicate about its suitability against certain types of fires. But even in the heat of the moment, it’s important to match the fire extinguisher to the fire hazard.

Classes of fire abcd code#

Fire code has a lot to say about choosing and placing extinguishers for just this reason. Using the wrong extinguisher can make a fire significantly worse. A sequence of fire extinguisher numbers and letters can save your life-or endanger it