Which extinguishing agent is suitable for a Class C fire?

Choosing the correct extinguishing agent for a Class C fire, which involves energized electrical equipment, is crucial for safety. The reason the selection of dry chemical or CO2 extinguishers is suitable is that these agents effectively interrupt the chemical reaction of a fire without conducting electricity, thereby preventing the risk of electric shock.

Dry chemical extinguishers contain agents that not only smother the fire but also disrupt the combustion process, making them effective against electrical fires. Carbon dioxide (CO2) extinguishers work by displacing oxygen around the fire and reducing heat while being non-conductive.

Using water on a Class C fire is hazardous, as it can conduct electricity and potentially cause electrocution. Foam extinguishers and Class K extinguishers, which are designed for flammable liquid and cooking oil fires respectively, are also not appropriate for electrical fires, as they do not address the unique risks these types of fires present. Thus, dry chemical or CO2 extinguishers are the best choice for safely combating Class C fires.