Which class involves energized electrical equipment?

Which class involves energized electrical equipment?

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

Answer: (B)

Fire classification recognizes the electrical hazard itself. When equipment is energized, the fire is placed in the category for energised electrical equipment. That status matters because it introduces the risk of electric shock and arcing, so the safe approach uses non-conductive extinguishing media and, if possible, is done only after the power is turned off. Water or other conductive agents can pose serious electrocution risk, so they’re avoided on these fires and appropriate extinguishing tools like CO2 or dry chemical are preferred. If the power is successfully cut, the fire’s classification may change depending on what fuel is burning. The other classes reflect different fuel sources—ordinary combustibles, flammable liquids, and metals—and don’t address the electrical energy hazard.

Fire classification recognizes the electrical hazard itself. When equipment is energized, the fire is placed in the category for energised electrical equipment. That status matters because it introduces the risk of electric shock and arcing, so the safe approach uses non-conductive extinguishing media and, if possible, is done only after the power is turned off. Water or other conductive agents can pose serious electrocution risk, so they’re avoided on these fires and appropriate extinguishing tools like CO2 or dry chemical are preferred. If the power is successfully cut, the fire’s classification may change depending on what fuel is burning. The other classes reflect different fuel sources—ordinary combustibles, flammable liquids, and metals—and don’t address the electrical energy hazard.