What is the primary firefighting agent for Class C fires?

The primary firefighting agent for Class C fires is carbon dioxide (CO2) extinguishers. Class C fires involve energized electrical equipment, and using the correct extinguishing agent is critical due to the risk of electric shock and further ignition. CO2 extinguishers are effective because they displace oxygen and can suppress the fire without conducting electricity, making them safe for use on live electrical systems.

While water and foam extinguishers can aggravate electric fires and pose a significant hazard, dry chemical extinguishers can also be effective in certain situations. However, CO2 specifically is favored for its immediate effectiveness on electrical fires and the fact that it leaves no residue, minimizing damage to sensitive electrical components. This makes carbon dioxide the ideal choice in responding to Class C fire incidents.