CO2 is particularly effective for which fire class due to non-conductivity?

CO2 is particularly effective for which fire class due to non-conductivity?

• A. Class A
• B. Class B
• C. Class C
• D. Class D

Answer: (C)

CO2 is especially effective on energized electrical fires because it is non-conductive. This lets you apply the extinguishing agent to equipment that’s live without creating a shock risk or short circuit, which is crucial for fires involving electrical circuits and devices. CO2 also blankets the flame and displaces oxygen, helping to smother the fire without leaving residue that could damage sensitive electrical components. This makes it the preferred choice for Class C fires, where the heat source is electricity. In contrast, for ordinary combustibles, liquid fuels, or metal fires, CO2 is not ideal: it doesn’t provide the cooling that water-based agents offer for Class A, nor does it address the vapor spread and fuel pool issues common with Class B, and metal fires (Class D) require specialized powders. Also, use in occupied spaces requires caution due to asphyxiation risk.

CO2 is especially effective on energized electrical fires because it is non-conductive. This lets you apply the extinguishing agent to equipment that’s live without creating a shock risk or short circuit, which is crucial for fires involving electrical circuits and devices. CO2 also blankets the flame and displaces oxygen, helping to smother the fire without leaving residue that could damage sensitive electrical components. This makes it the preferred choice for Class C fires, where the heat source is electricity.

In contrast, for ordinary combustibles, liquid fuels, or metal fires, CO2 is not ideal: it doesn’t provide the cooling that water-based agents offer for Class A, nor does it address the vapor spread and fuel pool issues common with Class B, and metal fires (Class D) require specialized powders. Also, use in occupied spaces requires caution due to asphyxiation risk.