Which extinguishing agents are commonly used for Class C fires?

Class C fires involve energized electrical equipment, and the properties of extinguishing agents used in such situations are critical for both effectiveness and safety. Dry chemical agents, CO2, and clean agents are well-suited for Class C fires for several reasons.

Dry chemical agents, like monoammonium phosphate, effectively interrupt the chemical reaction of the fire, making them useful for a variety of fire classes, including electrical fires. These agents do not conduct electricity, which reduces the risk of electric shock, thus allowing them to safely extinguish flames without reenergizing equipment.

Carbon dioxide (CO2) is another favored option for Class C fires. It works by displacing oxygen, effectively suffocating the fire. CO2 is non-conductive, which means it can safely be used around live electrical equipment without the risk of conducting electricity.

Clean agents, such as halon or clean-agent alternatives, leave no residue and are safe for use on sensitive electronic equipment often involved in Class C fires. These agents also do not conduct electricity, minimizing the risk during application.

Other choices listed do not effectively address the unique dangers associated with electrical fires. Water and foam are conductive and can create hazardous situations with electricity. Sand and dirt, while sometimes used to smother