What is the best way to extinguish a Class C fire?

To effectively extinguish a Class C fire, it is essential first to eliminate the electrical hazard by shutting off the power source before approaching the fire. Once the power is turned off, the fire can be treated as a Class A or B fire, depending on the combustible materials involved. This approach is critical because applying water or certain extinguishing agents directly to an energized electrical fire poses significant risks, including electrocution and further escalation of the fire.

The procedure not only prioritizes safety but also allows for the use of appropriate extinguishing agents designed for solid combustibles or flammable liquids once the electrical supply is disconnected. Knowing how to assess and mitigate the dangers posed by electrical hazards is a fundamental component of firefighter training and aligns with the practices outlined in the NFPA 1001 standard for safe firefighting operations.