What is a critical step before using a Class C extinguisher?

Using a Class C extinguisher, which is specifically designed for fires involving energized electrical equipment, necessitates the critical step of de-energizing the electrical equipment before applying the extinguisher. This is vital because Class C extinguishers are effective on electrical fires, but if the source of the electricity remains active, there is a significant risk of electrocution or further complications in handling the fire.

De-energizing the equipment ensures that the risk of electric shock is minimized, thereby making the area safer for the person fighting the fire. Once the electricity is shut off, using the extinguisher can safely suppress the flames without danger to the individual or potential escalation of hazards. This understanding is crucial for anyone involved in fire safety and emergency response and highlights how electrical safety protocols work in conjunction with fire suppression techniques.