What is the requirement for wires used at a potential of 6kV or greater?

The requirement for wires used at a potential of 6kV or greater emphasizes that there shall be no broken strands. This is crucial because wires that carry high voltage must maintain their integrity to ensure safety and reliability in electrical systems. When a wire has broken strands, it can lead to increased resistance, overheating, and ultimately failure, which poses significant safety risks.

Maintaining the structural integrity of these wires is essential to prevent arcing or electrical shorting, which can occur if the strands are compromised. A continuous and intact conductor ensures that the electrical current can flow safely and effectively without interruption.

While the other options may pertain to general guidelines for wire usage or safety, they do not directly address the critical importance of the electrical conductivity and safety associated with maintaining undamaged strands in high-voltage applications.