Which class of fire would involve energized building wiring, fuse boxes, transformers, or generators?

The correct choice identifies fires that involve energized electrical equipment, which is classified as a Class C fire. This category encompasses a variety of electrical sources including building wiring, fuse boxes, transformers, and generators. The primary concern with Class C fires is that they can pose a significant risk of electrocution or electrical shock if not handled correctly.

When dealing with a Class C fire, it is essential to ensure that the power source is turned off before attempting to extinguish the fire, as using water or non-approved extinguishing agents can be extremely dangerous. Extinguishing agents designed for electrical fires, such as carbon dioxide or dry chemical extinguishers, are typically recommended.

Understanding this classification helps firefighters make informed decisions about the safest and most effective means to combat such fires, ensuring the safety of both personnel and property.