How are portable extinguishers classified?

Portable extinguishers are classified primarily by their intended use, which helps in selecting the appropriate extinguisher for various types of fires. Each class of fire presents different hazards, and the extinguishing agents suitable for one class may not be effective against another.

For instance, there are distinct classes for fires involving ordinary combustible materials (Class A), flammable liquids (Class B), electrical equipment (Class C), and combustible metals (Class D), among others. This classification ensures that when a firefighter or a layperson reaches for a portable extinguisher, they can quickly identify the correct type to combat the specific material that is burning, thus enhancing safety and effectiveness in emergencies.

While capacity, color, and contents may provide additional information about the extinguisher, the foundational classification by intended use is critical for making informed decisions in fire response situations.