Cable bending radius calculation and standards

The calculation of the bending radius of the cable mainly depends on the diameter and material of the cable. The following are some common calculation methods and standards:

1. Calculate based on the outer diameter of the cable

The allowable bending radius of a cable is usually several times its outer diameter. For example, if the outer diameter of the cable is 10 mm and the allowable bending radius is 15 times the outer diameter, the bending radius is:

$15\times 10=150\text{mm}$

This means that the cable should form an arc when it is bent (turned), and the radius should be greater than or equal to 150mm.

2. Consider the material and structure of the cable

Different cable materials and structures require different bending radii. For example:

• Unarmored cable: The bending radius should not be less than 6 times the outer diameter of the cable.
• Armored or copper tape shielded cable: The bending radius should not be less than 12 times the outer diameter of the cable.

In addition, the calculation of bending radius for different types of cables, such as PVC cable, PE cable, XLPE cable, etc. may also be different.

3. Refer to industry standards and specifications

The specific calculation of the cable bending radius should also refer to relevant industry standards and specifications. For example:

• GB50303-2002 "Code for Acceptance of Construction Quality of Building Electrical Engineering": stipulates that the bending radius of the cable shall not be less than 6 to 25 times its diameter. The specific value should be determined based on the product manual or regional standards.

importance

It is very important to correctly calculate and adhere to the bending radius of the cables:

• Avoid damage: Excessive bending can damage the internal structure of the cable, resulting in degraded electrical performance or cable failure.
• Guaranteed performance: A reasonable bending radius can ensure that the performance of the cable at the bending part is not affected, ensuring the quality of signal transmission and the stability of power transmission.
• Extended life: Adhering to bend radius standards can extend the life of the cable and reduce maintenance and replacement costs.

In actual applications, the appropriate bending radius should be selected according to the specific cable type, diameter and use environment, and installation and operation should be carried out strictly in accordance with standards and specifications.