Water and water-based foams are not capable of putting out Class C fires because they cannot counteract the constant, electrical ignition source. Because water conducts electrical currents, using water on a Class C fire can result in a spread of the electricity and therefore the fire’s source of ignition.
What type of fire extinguisher is used for a Class C fire?
Carbon dioxide fire extinguishers extinguish fire by taking away the oxygen element of the fire triangle, and by removing the heat with a very cold discharge. Carbon dioxide extinguishers can be used on Class B and C fires.
What kind of fires can you use a foam extinguisher on?
Suitable for use on class A solid combustible fires and class B flammable liquid fires, foam fire extinguishers create a cooling blanket effect, smothering burning materials and preventing reignition. Not for use on chip pan fires unless they are described specifically as class F extinguishers!
What can Class C extinguishers be used on?
Class A – fires involving solid materials such as wood, paper or textiles. Class B – fires involving flammable liquids such as petrol, diesel or oils. Class C – fires involving gases. Class D – fires involving metals.
Could using a foam extinguisher on a Class C fire result in a shock hazard?
If used on a Class C fire (electrical equipment such as motors or kitchen appliances), it could create a shock hazard. The foam extinguisher can only be used on Class A and Class B fires only. If used on Class C fires, it will create a shock hazard.
What is foam extinguisher?
9 LITRES FOAM FIRE EXTINGUISHERS (Chemical Foam)
Foam is an effective smothering agent, used for liquid fires mainly. It acts by flowing over the liquid fuel oil surface and isolating the fire from the air, also prevents re-ignition due to the foam stability.
Can you use a foam extinguisher on an electrical fire?
Foam extinguishers build up of foam on the surface of the burning liquid, cutting off the oxygen supply to the fire and cooling the hot liquid. Electrical fires: If your foam extinguisher is tested to 35000 Volt (35kV) you can use the extinguishers on live electrical fires. However, keep a safety distance of 1m.
Can you use foam on an electrical fire?
In response to your questions – yes, you can use a foam fire extinguisher on an electric fire. Foam fire extinguishers work by expelling a large volume of foam, directly onto the fire.
What fire should a foam extinguisher not be used 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.
How does a foam extinguisher put out a fire?
Foam Fire Extinguishers provide a fast, powerful means of tackling flammable liquids. They do so by creating a blanket of foam that smothers the fire, cutting of its supply of oxygen of oxygen and contains the flame preventing re-ignition.
Which extinguisher should you not use to put out a flammable liquids fire?
Water extinguishers are used on Class A fires involving solid combustibles. They are not suitable for fires fuelled by flammable liquids or where electricity is involved.
What type of fuel is involved in a Class C fire?
Class C fires are fuelled by flammable gases such as methane, propane or butane. The appropriate extinguisher used to tackle a class C fire is a ‘dry powder’ extinguisher.