After installing direct buried cables, machine compaction should not be used within how many inches of the cable?

The correct answer is that machine compaction should not be used within 6 inches of the direct buried cables. This guideline is critical for ensuring the integrity and longevity of the cable installation. When machine compaction occurs too close to the buried cables, there is a risk of applying excessive force that can damage the cables or compromise their protective sheathing. This can lead to cable failure, which may cause unsafe conditions or interruption of service.

Maintaining a distance of at least 6 inches allows for sufficient surrounding soil to cushion the cables from heavy equipment and ensures that the cables remain undisturbed by the compaction process. This practice is part of proper installation and safety procedures in electrical work, aimed at protecting the installed infrastructure and ensuring it functions correctly over time.