What type of fire extinguisher is suitable for use on electrical fires?

The use of a CO2 extinguisher for electrical fires is appropriate because it is designed to operate without leaving a residue that could further compromise electrical equipment. Carbon dioxide is non-conductive and effectively displaces oxygen in the area of the fire, thus suffocating it without the risk of conducting electricity. This makes it a safe choice for extinguishing fires involving energized electrical equipment.

On the other hand, water extinguishers pose a significant danger in such situations, as water is a conductor of electricity and can create a risk of electrocution. Dry powder extinguishers can be used on electrical fires as well, but they can leave a residue that may damage sensitive electronics. Foam extinguishers are primarily suited for flammable liquids and should not be used on electrical fires due to their conductive nature as well. Therefore, CO2 extinguishers are the most suitable option for safely addressing electrical fires.