What is the correct fire extinguisher method for dealing with electrical equipment fires?

Using CO2 or dry chemical extinguishers is the recommended method for dealing with electrical equipment fires because these agents are effective in extinguishing fires without conducting electricity. CO2 extinguishers work by displacing oxygen and reducing the temperature of the fire, while dry chemical extinguishers interrupt the chemical reaction at the fire's source. Both types are non-conductive, making them safe for use on live electrical equipment.

Water-based extinguishers are unsafe for electrical fires since water is a good conductor of electricity. Using them could result in electric shock or further propagate the fire. Foam extinguishers are primarily designed for flammable liquid fires and are not suitable for electrical fires due to their conductive nature. Lastly, using any available extinguisher poses a danger as some extinguishing agents may not be suitable for electrical fires, risking injury or exacerbating the fire.