What are two techniques recommended for preventing excessive pulling tension in underground installations?

The recommended techniques for preventing excessive pulling tension in underground installations include midpoint and intermediate pulls. Midpoint pulls involve applying tension at a central location along the length of the cable or conduit, which helps to reduce the overall tension that is applied at any single point, thereby minimizing the risk of damage to the materials being installed. This method allows for a more controlled distribution of forces.

Intermediate pulls serve a similar purpose, allowing for smaller sections of cable or conduit to be pulled through at intervals. By breaking the installation down into more manageable sections and applying tension at various intermediate points, the risk of excessive pulling tension is further mitigated. This technique not only protects the integrity of the installation but also improves the overall efficiency of the pulling process.

Other options, while related to pulling techniques, do not specifically address the issue of excessive tension in the same effective manner as midpoint and intermediate pulls do. Alternative methods may introduce risks or inefficiencies that can compromise the installation's quality.