In ARFF terminology, Class C fires are fires involving which hazard?

In ARFF terminology, Class C fires are fires involving which hazard?

• A. Energized electrical equipment.
• B. Ordinary combustibles.
• C. Flammable liquids.
• D. Metals.

Answer: (A)

Class C fires involve energized electrical equipment. In ARFF training, this designation tells you the hazard is electrical energy, so the priority is to de-energize the equipment if it can be done safely and to use extinguishing methods that do not conduct electricity. Water is avoided on live electrical fires because it can carry current and pose a serious shock risk; nonconductive agents such as dry chemical powders or CO2 are typically used until power is confirmed off. Once the power is shut down, you address the remaining fire using the appropriate tactics for the fuel involved. For comparison, other classes cover different hazards: ordinary combustibles, flammable liquids, and metals, but those are not electrical energy hazards.

Class C fires involve energized electrical equipment. In ARFF training, this designation tells you the hazard is electrical energy, so the priority is to de-energize the equipment if it can be done safely and to use extinguishing methods that do not conduct electricity. Water is avoided on live electrical fires because it can carry current and pose a serious shock risk; nonconductive agents such as dry chemical powders or CO2 are typically used until power is confirmed off. Once the power is shut down, you address the remaining fire using the appropriate tactics for the fuel involved. For comparison, other classes cover different hazards: ordinary combustibles, flammable liquids, and metals, but those are not electrical energy hazards.