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

A dry chemical extinguisher is suitable for use on electrical fires because it is designed to interrupt the chemical reaction occurring in a fire. Specifically, extinguishers containing sodium bicarbonate or potassium bicarbonate as the primary agent are effective against Class C fires, which involve energized electrical equipment. These agents can safely smother the flames without conducting electricity, reducing the risk of electric shock to the person using the extinguisher.

In contrast, water-based extinguishers might pose significant risks when used on electrical fires since water is a conductor of electricity and could potentially lead to injury or further damage. Foam extinguishers are primarily effective for flammable liquid fires and are not suitable for electrical fires due to their possible conductive properties. CO2 extinguishers are also effective on electrical fires, but dry chemical extinguishers are often more widely available and versatile for general use, making them the preferred choice in many situations.