Which Class of fire extinguisher is used for energized electrical fires, employing non-conductive agents like CO2 or dry chemical?

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

Answer: (B)

When addressing energized electrical fires, the priority is to use an extinguishing agent that won’t conduct electricity. CO2 and dry chemical powders are non-conductive, so they can suppress the flame without creating a path for current to flow. This makes them suitable for electrical hazards and is labeled as Class C extinguishing capability. Remember that other classes target different fuels: Class A for ordinary combustibles, Class B for flammable liquids, and Class D for certain metal fires. So, for an energized electrical fire using non-conductive agents like CO2 or dry chemical, you’d use a Class C extinguisher.