What is a step to take when combating Class C fires?

When combating Class C fires, which involve energized electrical equipment, the most critical step is to secure power before attempting to extinguish the fire. This is due to the inherent dangers associated with water and electricity; water is a conductor of electricity and can lead to electrocution or further complications if used on an energized circuit.

By securing power, the potential for electrical shock is eliminated, allowing firefighters to approach and handle the fire safely. After the power is secured, appropriate extinguishing agents can be utilized without risk. Typically, non-conductive agents such as dry chemical extinguishers or CO2 can then be safely applied to extinguish the fire.

The other options can introduce significant hazards. For instance, using water without securing power presents a direct risk of electrocution. While AFFF can be effective for some fires, it is not recommended as the first option for Class C fires, especially if the power is still on. Applying foam directly to an energized source can also pose severe risks due to the conductivity of the water content in the foam. Thus, securing power is the foundational step in safely addressing Class C fires.