Which class of extinguisher is used for energized electrical equipment fires?

• A. Class A Fire Extinguisher
• B. Class B Fire Extinguisher
• C. Class C Fire Extinguisher
• D. Class D Fire Extinguisher

Answer: (C)

Fires in energized electrical equipment require an extinguishing agent that won’t conduct electricity. The extinguisher for electrical fires uses non-conductive agents—such as dry chemical powders or clean agents—that can suppress the flame without creating a path for current or causing arcing. This protects you from electric shock while you knock the fire down. If it’s safe to do so, de-energize the equipment first; otherwise, rely on the electrical-fire specific extinguisher to minimize electrical hazards. Water-based extinguishers must be avoided on energized electrical fires because water conducts electricity and can put you at serious risk. So, the right choice is the extinguisher designed for electrical fires, which is built to handle energized electrical hazards safely.