Fires with energized electrical equipment or appliances. Non conducting extinguishers such as carbon dioxide, multipurpose, dry chemical, and Halon fire extinguishers are ideal for controlling these types of fires. NEVER USE WATER FIRE EXTIGUISHER ON CLASS C FIRE. Class D fires: Fires fueled by combustible metals, such as magnesium, lithium, and sodium. It requires special extinguishing agents and techniques.