For Class C fires, the recommended action is.

• A. Use water
• B. De-energize and use CO2
• C. Use Halon 1301
• D. Use dry chemical

Answer: (B)

When fires involve energized electrical equipment, the priority is to remove the power source and use an extinguisher that won’t conduct electricity and won’t leave harmful residue. De-energizing eliminates the electrical current, reducing shock risk and preventing re-ignition as you fight the fire. Carbon dioxide is ideal in this situation because it is non-conductive, rapidly blankets the fire, and leaves no residue that could damage gear or short circuits. Water must be avoided on live electrical fires since it conducts electricity and can put nearby personnel at serious risk. While other agents like Halon 1301 or dry chemical can be used on electrical fires, Halon production is restricted and may not be readily available, and dry chemical can leave residue that can complicate equipment recovery. So the safest and most practical action is to shut off the power and apply CO2 for a clean, effective extinction.