Which class of fire involves energized electrical equipment?

Which class of fire involves energized electrical equipment?

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

Answer: (A)

When electricity is still flowing through the equipment, you’re dealing with a hazard that goes beyond the fuel itself. Energized electrical fires require a different approach because water and other conductive media can carry current, posing a shock risk and potentially spreading the electrical problem. The class designated for fires involving energized electrical equipment is the one you use when electricity is a factor. Extinguishing options are non-conductive and safe for electrical fires, such as dry chemical powders or clean agents like CO2, and you should shut off the power if it can be done safely. If the power is turned off and the fire is only fueled by ordinary combustibles or other materials, the classification may change to reflect that fuel. Fires involving ordinary combustibles, flammable liquids, and metals involve different extinguishing strategies, so they aren’t treated the same as energized electrical fires.

When electricity is still flowing through the equipment, you’re dealing with a hazard that goes beyond the fuel itself. Energized electrical fires require a different approach because water and other conductive media can carry current, posing a shock risk and potentially spreading the electrical problem. The class designated for fires involving energized electrical equipment is the one you use when electricity is a factor. Extinguishing options are non-conductive and safe for electrical fires, such as dry chemical powders or clean agents like CO2, and you should shut off the power if it can be done safely. If the power is turned off and the fire is only fueled by ordinary combustibles or other materials, the classification may change to reflect that fuel. Fires involving ordinary combustibles, flammable liquids, and metals involve different extinguishing strategies, so they aren’t treated the same as energized electrical fires.