What is the minimum requirement for fire protection at temporary electrical installations?

The minimum requirement for fire protection at temporary electrical installations is one portable fire extinguisher and 240 lb of rock dust.

This combination is crucial for ensuring safety in environments where temporary electrical installations may introduce potential fire hazards. A portable fire extinguisher is essential for immediate response to small fires, allowing personnel to act quickly before a fire can spread. The inclusion of rock dust serves as a fire suppression agent, particularly useful in mining or construction settings where electrical sparks could ignite flammable materials. In these contexts, rock dust can help smother fires and reduce their intensity.

This requirement emphasizes proactive safety measures, ensuring that personnel are equipped to handle fire emergencies effectively, thus reducing the risk of serious accidents and injuries.