Foam and water extinguishers must not be used to extinguish which type of fires?

Foam and water extinguishers must not be used to extinguish which type of fires?

• A. Chemical fires
• B. Wood fires
• C. Metal fires
• D. Electrical fires

Answer: (D)

When a fire involves energized electrical equipment, water-based extinguishing agents are dangerous because water conducts electricity. Using foam or water can carry current to the firefighter, create a shock hazard, and potentially spread the electrical fault or cause short circuits. That’s why foam and water extinguishers are not suitable for electrical fires. The safe approach is to disconnect power if possible and safe, then use non-conductive extinguishing agents such as carbon dioxide or a dry chemical powder rated for electrical fires.

When a fire involves energized electrical equipment, water-based extinguishing agents are dangerous because water conducts electricity. Using foam or water can carry current to the firefighter, create a shock hazard, and potentially spread the electrical fault or cause short circuits. That’s why foam and water extinguishers are not suitable for electrical fires. The safe approach is to disconnect power if possible and safe, then use non-conductive extinguishing agents such as carbon dioxide or a dry chemical powder rated for electrical fires.