Which extinguishing agent is known not to conduct electricity?

The correct extinguishing agent that is known not to conduct electricity is carbon dioxide. This is because carbon dioxide is a non-conductive gas that does not create a path for electricity, making it safe to use on electrical fires. It works by displacing oxygen in the area of the fire, effectively suffocating and extinguishing the flames without the risk of electrical conduction.

Using carbon dioxide is particularly advantageous in environments where electrical equipment is present, as it minimizes the risk of electrical shock and damage to sensitive equipment. In contrast, water is a good conductor of electricity and can create hazardous situations if used on electrical fires. Foam can also conduct electricity, particularly if it contains water in its formulation. Dust is generally considered safe for electrical fires, but it is less effective as a firefighting agent compared to carbon dioxide, which is specifically designed for such scenarios. Thus, carbon dioxide stands out as the safest choice in situations involving electrical fires.