Which classification includes all fires that involve energized electrical equipment?

The classification that includes all fires involving energized electrical equipment is Class C. This classification specifically addresses fires that ignite due to electrical equipment, such as wiring, appliances, or other devices that are operational and pose an electrical hazard.

When responding to Class C fires, it is crucial to use the appropriate extinguishing agents. For instance, using water on electrical fires can be extremely dangerous, as water is a conductor of electricity. Instead, fire extinguishers rated for Class C fires typically use non-conductive agents, such as carbon dioxide or dry chemical agents, that can effectively extinguish the fire without posing a risk of electrocution.

Classes A and B involve other types of materials; Class A refers to ordinary combustibles like wood and paper, while Class B deals with flammable liquids and gases. Class D fires refer to combustible metals, which require specialized firefighting techniques and agents. Knowing the correct classification helps responders choose the right approach to extinguish different types of fires safely.