Know Your Fire Extinguishers: Why Soda-Acid and Foam Types Don't Mix with Electrical Fires Soda-acid and foam-type fire extinguishers should not be used to extinguish electrical fires. Foam-type fire extinguishers are designed for Class A and Class B fires, which involve flammable liquids like gasoline, oil, and solvents. For electrical fires , it is recommended to use a fire extinguisher specifically designed for such situations, such as a CO2 (carbon dioxide) fire extinguisher or a dry chemical fire extinguisher labelled as suitable for Class C fires. Fire Extinguisher Type Soda-Acid Foam-Type CO2 (Carbon Dioxide) Dry Chemical For Downloading the File in PDF HD Format, please Click Below