Monoammonium phosphate effectively smothers the fire, while sodium bicarbonate induces a chemical reaction which extinguishes the fire. Fire extinguishers with a Class C rating are suitable for fires in “live” 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.
What Colour fire extinguisher is not suitable for electrical fire?
What do the different fire extinguisher colour mean and how are they used for?
|Red||Water||Not suitable for electrical or deep fat fires*|
|Blue||Dry powder||Not suitable for electrical fires over 1,000 volts|
|Cream||Foam||Not suitable for domestic fires|
|Black||Carbon dioxide||Suitable for high and low voltage electrical fires|
Can you use fire extinguisher on electrical fire?
Fire extinguishers with a Class C rating are suitable for fires in “live” electrical equipment. Both monoammonium phosphate and sodium bicarbonate are commonly used to fight this type of fire because of their nonconductive properties.
Which type of fire extinguisher do you use to fight an electrical fire if carbon dioxide extinguisher is unavailable?
Both carbon dioxide and dry chemicals can be used for electrical fires. An advantage of carbon dioxide is that it leaves no residue after the fire is extinguished. When electrical equipment is not energized, extinguishers for Class A or B fires may be used.
What does a blue circle mean in fire safety?
The general mandatory sign of a white exclamation mark on a blue circle may be used in conjunction with a fire instructions notice. Signs indicating mandatory requirements consist of a blue circle with the pictogram or text in white positioned centrally.
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.
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.