What is the optimal way to extinguish a Class C fire?

Class C fires involve energized electrical equipment. The use of water would be inappropriate and dangerous, as it can conduct electricity, potentially leading to further risk of shock or electrocution. Foam is typically used for Class B fires (flammable liquids) and does not effectively suppress a Class C fire.

Dry chemical extinguishers contain agents that can effectively interrupt the chemical reaction of the fire and also do not conduct electricity, making them safe to use on electrical fires. This makes dry chemical extinguishers the optimal choice for Class C fires, as they effectively suppress flames while ensuring the safety of the user.

Dirt, while sometimes considered in certain situations, is not a recommended method for extinguishing Class C fires due to its ineffectiveness and unpredictability in controlling the fire effectively.