Which extinguisher is appropriate for use on a Class C fire?

A Class C fire involves energized electrical equipment, such as wiring, appliances, or machines. When dealing with such fires, it is crucial to use extinguishing agents that do not conduct electricity, as this could lead to serious injury or worsen the situation.

The appropriate extinguishers for a Class C fire include CO2 (carbon dioxide) and dry chemical extinguishers. CO2 works by displacing oxygen and is effective for electrical fires because it doesn’t leave a residue that could damage the equipment. Halon, although less commonly used today due to environmental concerns, is also effective for Class C fires for similar reasons.

Dry chemical extinguishers typically contain ABC powder that can also put out Class C fires by interrupting the chemical reaction of the fire.

Since both CO2 and dry chemical extinguishers can safely and effectively combat Class C fires, the choice that encompasses both these options is indeed the most suitable one.