What is the minimum bending radius of primary underground cable in relation to its diameter?

The minimum bending radius of primary underground cable is crucial for maintaining the integrity and functionality of the cable over its lifespan. When a cable is bent, the physical stress on it can potentially damage both the insulation and the conducting elements.

Opting for a bending radius that is at least 12 times the diameter of the cable ensures that the bending does not induce excessive mechanical stress that could lead to failures such as insulation breakdown or reduced electrical performance. This standard is recommended in various engineering guidelines and is based on extensive testing and practical experience in the field.

In essence, adhering to this minimum radius helps in preventing damage that might occur during installation or in response to environmental factors such as ground movement or temperature fluctuations. Therefore, using 12 times the diameter as a benchmark serves to enhance the reliability and longevity of primary underground cables.