Class C fires involve flammable gases and electrical equipment. These fires can occur when electrical appliances, wiring, or circuits overheat or malfunction. Common sources include wires, motors, and transformers. To extinguish Class C fires safely, it is crucial to use a fire extinguisher rated for electrical fires, such as a Class C fire extinguisher. Water should never be used, as it can conduct electricity and pose a greater risk. Always ensure that the power source is turned off before attempting to fight the fire or evacuate the area.