How many classes of fires are there?

There are four classes of fires, categorized based on the type of fuel involved and how they should be extinguished. The classes are:

1. Class A: Fires involving ordinary combustibles such as wood, paper, and cloth.
2. Class B: Fires that involve flammable liquids and gases, such as gasoline or oil.
3. Class C: Fires that are electrical in nature, involving appliances, wiring, or other energized equipment.
4. Class D: Fires that involve combustible metals, such as magnesium or sodium, which require special extinguishing agents.

Understanding these classes is crucial for effective firefighting and safety strategies, as each type requires different methods and materials for extinguishment. Knowing the proper class of fire helps responders to use the appropriate fire extinguisher and techniques based on the materials burning. This classification system ensures that those responding to a fire incident can quickly assess the situation and act accordingly to minimize damage and enhance safety.