With a triple-ribbed pin, this coupling element offers particularly high tensile strength.

Grounding rods typically consist of connectable individual rods with a length of 1.5 m. The grounding rods from DEHN feature a self-locking coupling with a hole and pin. The advantage of this design is that the coupling automatically locks during driving, ensuring a mechanically high-strength and electrically safe connection. Additional steps such as screwing are not required.

Various types of impact tools are used to drive the grounding rods. The driving should occur at 1200 blows per minute. At a significantly higher impact frequency, the performance is usually insufficient to reach the required depth with the grounding rod. Conversely, at too low an impact frequency, which is typical for pneumatic hammer tools, the impact force may be too high while the strike rate is too low. The weight of the driving hammer should be at least 20 kg.

The possible penetration depth of grounding electrodes depends on the geological conditions. In light soil areas, such as coastal regions or wetlands, depths of 30 m to 40 m can be achieved. In extremely heavy soils, such as sandy soils, the penetration depth is often limited to a maximum of 12 m. The more the soil around the grounding rod is compacted during installation, the better the electrical contact. A grounding rod with an outer diameter of 20 mm provides less compaction than one with an outer diameter of 25 mm. Experience shows that grounding rods with an outer diameter of 25 mm deliver the best results in heavy soils in terms of maximum penetration depth and soil compaction.