Which types of grounding electrodes are preferable in areas with rocky soil?

In areas with rocky soil, the use of mesh electrodes or multiple ground rods is preferable due to the challenges posed by the soil composition. Rocky soil can limit the effectiveness of a single grounding rod because the rod may not penetrate deeply enough to achieve good grounding, which typically relies on sufficient earth contact for effective dissipation of electrical currents.

Mesh electrodes or multiple ground rods expand the interface with the ground, allowing for improved connectivity with more extensive soil volume, which enhances grounding performance. By distributing the grounding system across a broader area, these configurations can establish better electrical conductivity and lower resistance to ground, even in conditions where soil quality is suboptimal.

Concrete electrodes alone can be less effective compared to a combination of grounding methods, as they may not provide sufficient grounding in rocky contexts. Similarly, metal plates might also face challenges in achieving adequate grounding due to inadequate soil contact.

Hence, in rocky soil environments, mesh electrodes or multiple ground rods ensure improved reliability and safety for grounding applications.