What are the classes of fire?
Fires are classified into six groups: A, B, C, D, F and Electrical.
Class A are the fires involving solid materials such as wood, paper, textiles and other combustible materials. Class B are the fires of flammable liquids such as petrol’s and spirits. Class C are the fires involving gases. Class D are the fires involving burning metals. Electrical are the fires of live electrical apparatus. Class F are the fires involving cooking oils such as in deep-fat fryers.
Water fire extinguishers take a red label. This type of fire extinguisher is most commonly used for Class A fires (those caused by flammable solids like wood or paper).
Foam fire extinguishers and our MultiCHEM range display a cream label. They’re most commonly used on Class B fires (started by flammable liquids). However, as they’re water-based, they’ll also work on Class A fires.
Dry powder fire extinguishers display a blue label. These extinguishers are also known as ABC extinguishers because of their versatility to help tackle Class A, B and C fires.
CO2 extinguishers feature a black label. These fire extinguishers are suitable for Class B fires (flammable liquid) but are also recommended for electrical fires thanks to the fact it’s non-damaging to electrical equipment.
Wet chemical extinguishers feature a bright yellow label. This type of extinguisher is specifically designed for use on Class F fires (cooking oils and fats).
Water Mist fire extinguishers also feature a red label. These fire extinguishers are suitable for use on Class A (combustible materials) and Class F fires (cooking oils and fats).
The grid below shows what type of fuels are involved in each class of fire, along with a key to which class fire different fire extinguishers cover
This guide is for reference only and therefore should not be treated as professional advice. Always seek expert advice from a fire professional relating to your specific circumstances.
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