Which type of extinguisher is suitable for electrical fires?

The correct answer is a dry chemical extinguisher, which is effective for electrical fires because it can safely interrupt the chemical reaction of the fire without conducting electricity. Dry chemical extinguishers typically contain agents such as monoammonium phosphate or sodium bicarbonate, which are designed to suppress flames rapidly and coat the burning material, inhibiting further combustion.

In the case of electrical fires, it is crucial to use an extinguisher that does not conduct electricity, which is why water extinguishers, while effective for common combustibles, are not suitable for electrical fires due to water's conductive properties. Foam extinguishers, while effective for flammable liquids and solids, can also pose a risk with electrical equipment. Wet chemical extinguishers are designed primarily for Class K fires (cooking oils and fats) and are not intended for electrical fires.

Using the appropriate extinguisher is vital for safety and effectiveness in extinguishing different types of fires.