Class C fires? Extinguishing agent?

Class C fires? Extinguishing agent?

• A. Water
• B. Foam
• C. Electrical (motors, appliances, switches)
• D. Wet powder

Answer: (C)

Fires that involve energized electrical equipment require an extinguishing method that does not conduct electricity. Water is out because it can carry current and pose a shock hazard to anyone nearby, and it can also cause further damage to live electrical gear. Foam shares the same problem since it’s water-based, so it’s not ideal for electrical fires. Wet powders often contain moisture and can be conductive or leave residues that harm delicate electrical components. The appropriate approach is to use an extinguishing method designed for electrical fires—non-conductive media that won’t energize the equipment or operators, such as clean agents or dry chemical powders. If it’s safe to do so, shutting the power off first is best, then apply a non-conductive extinguishing agent. This is why identifying the scene as involving electrical equipment guides the choice toward non-conductive extinguishing options.

Fires that involve energized electrical equipment require an extinguishing method that does not conduct electricity. Water is out because it can carry current and pose a shock hazard to anyone nearby, and it can also cause further damage to live electrical gear. Foam shares the same problem since it’s water-based, so it’s not ideal for electrical fires. Wet powders often contain moisture and can be conductive or leave residues that harm delicate electrical components. The appropriate approach is to use an extinguishing method designed for electrical fires—non-conductive media that won’t energize the equipment or operators, such as clean agents or dry chemical powders. If it’s safe to do so, shutting the power off first is best, then apply a non-conductive extinguishing agent. This is why identifying the scene as involving electrical equipment guides the choice toward non-conductive extinguishing options.