Which type of fire extinguisher is suitable for Class "C" fires?

The correct choice for extinguishing Class "C" fires, which involve electrical equipment, is the dry powder extinguisher. This type of extinguisher is specifically formulated to safely extinguish fires caused by electrical equipment without conducting electricity back to the operator or potentially causing further danger. Dry powder agents suffocate the fire by creating a barrier between the fuel and the oxygen needed for combustion.

Other options, such as water-based extinguishers, are unsuitable for Class "C" fires because water can conduct electricity and pose a significant risk of shock to the user. Foam extinguishers are effective on flammable liquids and solids but are also not suitable for electrical fires due to the risk of electrical conduction. CO2 extinguishers can be effective on Class "C" fires as well as on flammable liquid fires, but dry powder extinguishers are often preferred because they can be used on a wider range of fire types and are versatile in their application.