Which of the following defines a Class C fire?

A Class C fire is defined as one that involves energized electrical equipment. This classification is crucial because the approach to extinguishing a Class C fire differs significantly from that of other classes, particularly due to the risks associated with electrical shock. When responding to a Class C fire, it is essential to first disconnect the power source if it is safe to do so, and then use appropriate extinguishing agents, such as non-conductive extinguishing agents, to put the fire out without the risk of creating further hazards.

The significance of recognizing the specifics of Class C fires cannot be understated, since using water on an electrical fire or an improper extinguishing agent can lead to dangerous outcomes, including personal injury or worsening the fire. Understanding this classification helps personnel effectively manage electrical fire emergencies in an aviation context, especially where complex machinery and sensitive equipment are involved.