For Class Charlie fires, which extinguishing approach is described as the primary method in the material?

• A. CO2
• B. Fog attack
• C. Water
• D. Dry chemical

Answer: (B)

Class Charlie fires involve energized electrical equipment, so the tactic centers on cooling and containing the fire while minimizing shock risk. The primary method described is a fog attack with water. A fine water mist absorbs heat rapidly and blankets the area, cooling the flames and surrounding components without creating a solid water stream that could form a conductive path if power is still on. The mist also reaches into cramped spaces and behind panels where flames may be hidden, helping to suppress the fire at its source. If it’s safe to do so, disconnect the electrical power first; otherwise, maintain the fog attack to control the fire while you work to isolate the power. Other extinguishing options can be used in specific situations, but they don’t offer the same combination of cooling efficiency and electrical hazard management as a fog attack for energized electrical fires.