The bending radius of a cable refers to the minimum angle at which the cable is allowed to bend during installation and use. If the actual bending radius is too small, it will cause internal conductor to stretch or compress, damage the insulation layer, and ultimately lead to electrical faults. Different types of cables have different requirements for bending radius: fixed laying cables usually have an outer diameter of 6 times, while drag chain cables need to reach 7.5 to 10 times the outer diameter. During construction and installation, wiring should be strictly in accordance with the product specifications to avoid excessive bending.