The minimum bending radius of Type P cable shall be:

The correct choice is based on the fundamental principle of ensuring the integrity and functionality of Type P cable during installation and operation. Type P cables, which are often used in flexible applications, require careful handling to avoid damage, particularly to the conductors and insulation. The requirement that the bend radius be "adequate to prevent damage to the cable" takes into account various factors, such as the type of materials, environmental conditions, and specific installation practices.

While specific bending radius ratios like 1.5, 2, or 3 times the outer diameter can be applicable for many cable types, the statement indicates a broader principle that prioritizes the prevention of physical stress and electrical failure that can occur with improper bending. This means that in practice, the bending radius must be determined based on the manufacturer's specifications, which are designed to protect the performance and longevity of the cable. Thus, ensuring it is adequate to prevent damage is the most encompassing and reliable approach for handling Type P cables.