Shielded conductors operating at over 1000 volts must not be bent to a radius less than:

For shielded conductors operating at over 1000 volts, the requirement to not bend the cable to a radius less than 12 times the overall diameter ensures that the integrity of the insulation and shielding is maintained. Bending cables too sharply can create stress points that may lead to damage, decrease in performance, or failure of the insulation, which is critical in high-voltage applications. The guideline of using a minimum bending radius of 12 times the overall diameter helps protect against these risks by promoting a gradual curve that minimizes mechanical stress and maintains the electrical and mechanical properties of the cable. This standard is especially important in high-voltage scenarios where the consequences of failure could be severe, thus emphasizing safety and reliability in installations.