Which method is NOT acceptable for extinguishing an electrical fire?

Which method is NOT acceptable for extinguishing an electrical fire?

• A. CO2 extinguisher
• B. Water
• C. Dry chemical extinguisher
• D. Foam extinguisher

Answer: (B)

When fighting an electrical fire, you must avoid creating a path for electricity to travel through the extinguishing agent. Water conducts electricity, so using it on energized electrical equipment can energize the water stream, put you at risk of shock, and potentially spread the current to other areas or components. That’s why water is not suitable for electrical fires. Nonconductive extinguishing options are preferable because they can suppress the flame without conducting electricity. CO2 extinguishers displace oxygen and are effective for electrical equipment without leaving conductive residue. Dry chemical extinguishers are versatile and interrupt the chemical reactions occurring in the flame while remaining nonconductive. Foam extinguishers can also be used on electrical fires if they’re rated for such use, as they blanket and cool the fuel surface. If it’s safe to do so, shut off the power before attacking the fire and call for help if the situation is uncertain.

When fighting an electrical fire, you must avoid creating a path for electricity to travel through the extinguishing agent. Water conducts electricity, so using it on energized electrical equipment can energize the water stream, put you at risk of shock, and potentially spread the current to other areas or components. That’s why water is not suitable for electrical fires.

Nonconductive extinguishing options are preferable because they can suppress the flame without conducting electricity. CO2 extinguishers displace oxygen and are effective for electrical equipment without leaving conductive residue. Dry chemical extinguishers are versatile and interrupt the chemical reactions occurring in the flame while remaining nonconductive. Foam extinguishers can also be used on electrical fires if they’re rated for such use, as they blanket and cool the fuel surface. If it’s safe to do so, shut off the power before attacking the fire and call for help if the situation is uncertain.