Which class of fire extinguishers is used for electrical fires?

• A. Class A
• B. Class B
• C. Class C
• D. Class D

Answer: (C)

Fighting an electrical fire requires an extinguisher that won’t conduct electricity. The extinguisher designed for energized electrical fires is the right choice because its extinguishing agents are non-conductive and safe to use on live electrical equipment. Common options for this scenario are dry chemical powder or carbon dioxide, which suppress the fire without creating a path for electricity to travel.

Using extinguishers intended for ordinary combustibles, flammable liquids, or metals isn’t appropriate here because they don’t address the electrical aspect of the fire and can be dangerous—water-based agents, in particular, can conduct electricity and pose a shock or electrocution risk. If safe, switch off the power first, keep a safe distance, and aim at the base of the fire with a sweeping motion.