Class C fires, which involve energized electrical equipment, can also be extinguished with CO2. CO2 displaces the oxygen to extinguish the fire. … This “cloud” of CO2 reduces the oxygen in the air around the fire and smothers it.
Why is carbon dioxide effective at extinguishing fires?
Carbon dioxide extinguishes work by displacing oxygen, or taking away the oxygen element of the fire triangle. The carbon dioxide is also very cold as it comes out of the extinguisher, so it cools the fuel as well.
Why carbon dioxide CO2 is an effective extinguishing agent?
Fire extinguishing properties
CO2 (Carbon dioxide) discharges produce, along with the fuel, a significant reduction in oxygen, thus paralysing the combustion reaction. Depending on the type of fuel, the minimum necessary CO2 (Carbon dioxide) concentration ranges from 30% to 75%.
What is the best agent to extinguish a Class C fire?
Carbon Dioxide – Carbon Dioxide fire extinguishers extinguish fire by taking away the oxygen element of the fire triangle and also be removing the heat with a very cold discharge. Carbon dioxide can be used on Class B & C fires.
How do you extinguish a Class C fire?
Extinguish a Class C fire by shutting off the electrical power, which serves as the fuel source for the electrical fire. Non-conductive chemicals like carbon dioxide should also be used to suppress the flames.
How does carbon dioxide control fire?
Carbon dioxide covers the fire and cut-off the contact of oxygen and fuel. This is because carbon dioxide is heavier than the oxygen. … When carbon dioxide is released, it expands enormously and cools down. Due to this temperature it brings down and this helps in controlling the fire.
Why is co2 better than dry chemical for fighting a Class C fire?
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.