What is the minimum distance a live 4160 volt power cable must be from a loaded blast hole?

• A. 5 meters
• B. 8 meters
• C. 10 meters
• D. 25 feet

Answer: (B)

The minimum distance a live 4160 volt power cable must be from a loaded blast hole is 8 meters. This regulation is primarily in place to ensure safety and to prevent electrical hazards that could arise during blasting operations. The potential for a blast to dislodge electrical cables or conduct electricity through the air or materials presents a significant risk. By maintaining a distance of at least 8 meters, the likelihood of accidental ignition of explosives due to electrical arcing or stray currents is significantly minimized.

This distance is not arbitrary; it’s been established based on safety standards to provide a buffer zone that mitigates the risk of inadvertent detonations caused by electrical interference. Compliance with these regulations is crucial for the safety of personnel working in proximity to explosive activities and for maintaining the integrity of both electrical and blasting operations.

Understanding the importance of such minimum distances reinforces the need for adhering to safety protocols in mining environments, where the interaction of different types of energy sources and materials can pose considerable hazards.