OSHA #511 Occupational Safety and Health Standards for General Industry course

Which class of fire requires the use of electrically nonconductive extinguishing media for safety?

1. Class A

2. Class B

3. Class C

4. Class D

The correct answer is: Class C

Class C fires involve energized electrical equipment and pose a significant risk of electrocution if water or conductive extinguishing media is used. Therefore, the use of electrically nonconductive extinguishing media, such as carbon dioxide (CO2) or dry chemical extinguishers, is essential for safely addressing these types of fires. These extinguishing agents are effective in putting out the fire without creating the risk of electric shock. The focus on using nonconductive agents is crucial in a workplace setting where electrical components can be part of the environment, thus underlining the importance of using the correct extinguishing medium to ensure both safety and efficacy in extinguishing the flames.