What is the correct class of fire extinguisher for electrical fires?

The correct class of fire extinguisher for electrical fires is Class C. Class C extinguishers are specifically designed to combat fires that involve electrical equipment, such as wiring, circuit breakers, and appliances. The extinguishing agents used in Class C extinguishers do not conduct electricity, making them safe to use on live electrical fires.

In contrast, Class A extinguishers are used for ordinary combustible materials like wood, paper, and cloth, while Class B extinguishers are suited for flammable liquids such as gasoline and oil. Class D extinguishers are intended for fires involving combustible metals, typically found in specialized industrial settings. Thus, for electrical fires, the appropriate choice is Class C, due to its effectiveness and safety regarding live electrical sources.