Foam agents also separate the oxygen element from the other elements. 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.
What type of fire should you not use a foam extinguisher on?
Foam extinguishers are also safe for use on flammable liquid fires. They CANNOT be used on electrical fires or flammable metal fires as this extinguisher could end up exacerbating the fire.
What should a fire extinguisher never be used on?
These methods of fire extinction are useful additions to extinguishers. Fire buckets can be used filled with water on Class A fires, or with sand to use as an absorbing agent on spilled flammable liquids (Class B). They must not be used with water on burning fat or oil or on electrical appliances.
Can foam extinguishers be used on electrical or metal fires?
AFFF FOAM. AFFF foam fire extinguishers have a cream label and are highly effective on class A and class B fires (the foam agent helps to prevent re-ignition). If foam extinguishers have been dielectrically tested they can be used on electrical appliances.
Which of these is the best to use on an electrical fire?
The best way to put out an electrical fire is with a fire extinguisher. If you don’t have one, remember these tips. 1. You should never throw water on an electrical fire because water conducts electricity and you could be electrocuted.
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.
How do AFFF extinguishers work?
How Does AFFF Work? … When applied to a hazard, AFFF produces an aqueous film that spreads across the surface of the fire to extinguish the flame. This film is what gives AFFF its name, and it works by suppressing flammable liquid vapor, effectively suffocating the fire hazard.
Which extinguisher is most suitable for oil fires?
Wet Chemical fire extinguishers are the most effective against Class F fires (cooking oils and fats) e.g fats, grease and oil. Therefore they are practical in a kitchen environment.
When should a fire extinguisher be used?
You should only consider using a fire extinguisher if all members of your home have been alerted to the fire and the fire department has been called. Also, make sure you are safe from smoke and that the fire is not between you and your only escape route.