Which extinguishing agent is typically used in a Class C Fire Extinguisher?

A Class C fire involves energized electrical equipment. The primary characteristic of an effective extinguishing agent for this type of fire is that it must not conduct electricity. CO2 (carbon dioxide) is an ideal choice for this situation because it is non-conductive and works by displacing oxygen, thus suffocating the fire. When CO2 is released from an extinguisher, it effectively cools the area as it displaces both heat and oxygen from the burning material.

Water and foam are conductive and can pose a significant risk if used on electrical fires, as they may cause electrical shock or the spread of the fire beyond its initial location. Dry chemical agents can also extinguish a Class C fire, but they are typically categorized broadly and can leave a residue that may interfere with electrical components. CO2, however, leaves no residue and is specifically designed for safety in electrical environments, making it the most suitable extinguishing agent for Class C fires.