What is the main guideline for the installation of ground rods?

The main guideline for the installation of ground rods emphasizes that they should be driven vertically if possible. This vertical position allows for better grounding effectiveness by ensuring the maximum length of the rod is in contact with the earth. A vertical installation encourages better electrical connection with the surrounding soil, which helps in the proper dissipation of fault currents into the ground.

In addition, a vertical installation minimizes the possibility of moisture accumulation around the rod, which can lead to corrosion or degradation over time. This guideline is critical for maintaining the integrity and performance of the grounding system, ensuring safety and reducing the risk of electrical shock or equipment damage.

While other options touch upon aspects of ground rod installation, they do not align with the standard practices that prioritize vertical placement for optimal grounding effectiveness.