The correct bending radius is one of the most critical factors in preventing cable failure. It's determined by the cable's construction and voltage rating. The general rule is to follow the minimum bending radii specified by the cable manufacturer. For most medium-voltage shielded cables, the NEC recommends a minimum bending radius of 12 times the cable's outside diameter. Exceeding this limit can cause the cable's internal layers (insulation, shielding) to separate or buckle, leading to premature failure. Our tools and guiding devices are designed to help maintain these critical radii throughout the installation process.