Certified Fire Inspector II Practice Test 2025 - Free Practice Questions and Study Guide for Fire Inspectors

The most suitable type of fire extinguisher for electrical fires is the Class C extinguisher. Class C extinguishers are specifically designed for fires that involve energized electrical equipment, such as wiring, circuit breakers, and electrical appliances. The extinguishing agents in Class C extinguishers, such as carbon dioxide (CO2) or dry chemical powders, do not conduct electricity, reducing the risk of electrocution when used on live electrical fires.

Using an inappropriate extinguisher type on electrical fires can lead to dangerous situations. For instance, Class A extinguishers are intended for ordinary combustibles like wood or paper and could conduct electricity, potentially creating a hazard. Similarly, Class B extinguishers are used for flammable liquids, which do not apply to electrical fires. Class D extinguishers are for combustible metals and do not address the unique requirements of electrical fires. Therefore, using a Class C extinguisher is crucial for effectively and safely extinguishing electric fires while minimizing the risks associated with water or other conductive agents.