Which class of fire extinguishers would be most suitable for a fire caused by electrical equipment?

The most suitable class of fire extinguishers for a fire caused by electrical equipment is Class C. This class specifically targets fires that involve energized electrical equipment, such as wiring, circuit breakers, and appliances. The extinguishing agents used in Class C extinguishers do not conduct electricity, making them safe for use on electrical fires.

Using a Class C extinguisher ensures that the fire can be extinguished without risking electric shock to the person operating the extinguisher. Additionally, many Class C extinguishers utilize non-conductive agents such as carbon dioxide (CO2) or dry chemical agents, which are effective in quickly suppressing electrical fires while preventing re-ignition.

In contrast, other classes of extinguishers are designed for different types of fires. Class A extinguishers are for ordinary combustible materials like wood or paper, Class B extinguishers target flammable liquids, and Class D extinguishers are meant for combustible metals. Therefore, these options are not recommended for handling fires involving electrical equipment, which is why Class C is the appropriate choice.