In case of water-fed fires, which class of fire would it not be appropriate to use water on?

In the context of fire classifications, Class C fires involve energized electrical equipment. When dealing with Class C fires, using water as an extinguishing agent is inappropriate and hazardous due to water's conductivity. Water can conduct electricity, posing a significant risk of electric shock to the individual attempting to extinguish the fire.

Instead of water, non-conductive fire extinguishing agents such as carbon dioxide or dry chemical extinguishers should be utilized for Class C fires. This ensures the safety of the responder and is an effective method to extinguish fires involving electrical equipment without the risk of electrical shock or further hazards.

In contrast, water is effective for Class A fires (ordinary combustibles like wood, paper, and most plastics), but it should never be used on Class B fires (flammable liquids) or Class D fires (combustible metals) as it could either cause the fire to spread or create additional hazards. Understanding the proper response to different classes of fires is crucial for safety and effectiveness in firefighting operations.