In what context are dry-chemical fire extinguishers primarily used?

Dry-chemical fire extinguishers are primarily used for electrical fires due to their ability to interrupt the chemical reaction of a fire and prevent re-ignition. These extinguishers contain a powder that acts as a flame retardant, effectively smothering flames. They are effective against various classes of fires, including Class A (ordinary combustibles such as wood), Class B (flammable liquids), and Class C (electrical fires), making them a versatile choice for many firefighting situations.

For electrical fires specifically, the non-conductive nature of the dry chemical agents ensures that they can be used safely without the risk of electrical shock. This makes them especially valuable in environments where electrical equipment is present, such as offices and industrial settings. Thus, their application in extinguishing electrical fires makes them a critical component of fire safety equipment in various settings.