Water extinguishers are for Class A fires only; they should not be used on Class B or C fires. The discharge stream could spread the flammable liquid in a Class B fire or could create a shock hazard on a Class C fire.
Which fire extinguisher should not be used to extinguish Class B?
Flammable gases include things like propane, hydrogen, and butane. The fuel sources of class B fires (gases and liquids) can be quite volatile and cannot be extinguished by water, which will only make the fuel source spread, thus spreading the fire.
What are Class A and B fires?
There are four classes of fires: Class A: Ordinary solid combustibles such as paper, wood, cloth and some plastics. Class B: Flammable liquids such as alcohol, ether, oil, gasoline and grease, which are best extinguished by smothering.
What are Class B and C fires?
What types of fires can be extinguished with carbon dioxide (CO2) fire extinguishers? Class B fires which involve flammable liquids and gases, solvents, oils, greases (excluding cooking oils/greases in depth) tars, oil-based paints and lacquers. Class C fires which involve energized electrical equipment.
Which two types of fire extinguishers should you never use on an electrical fire?
Water fire extinguishers are NOT suitable for electrical fires as water is a conductor and you are at risk of electrocution if used on this type of fire. They are also NOT suitable for flammable liquids or flammable metal fires as it will not extinguish the fire.
Where should a Class B fire extinguisher be placed?
1. Where should fire extinguishers be located?
- Class A: Locations that contain ordinary combustible materials, including offices, classrooms, and assembly halls.
- Class B: Workshops, storage areas, garages, warehouses, or service and manufacturing areas that contain flammable liquids or gasses.
What is the difference between ABC and co2 fire extinguisher?
CO2s are designed for Class B and C (flammable liquid and electrical) fires only. Carbon Dioxide is a non-flammable gas that extinguishes fire by displacing oxygen, or taking away the oxygen element of the fire triangle.