Which extinguishing agent is associated with Class E fires?

• A. Halon
• B. Water
• C. Dry Chemical
• D. Foam

Answer: (A)

Class E fires refer to fires in electrical equipment, so the extinguishing agent must be non-conductive and leave minimal residue to protect electronics. Halon fits this need as a clean, nonconductive agent that suppresses flame by interrupting the chemical reactions in the flame, quickly reaching and protecting energized electrical gear without creating a shock hazard or messy residue. Water poses electrocution risk and can damage equipment; foam isn’t ideal for electrical enclosures, and dry chemical, while effective in many scenarios, can contaminate delicate electrical components. That combination of quick, nonconductive, residue-free action is why Halon is associated with Class E fires.