Use a plate electrode on bare rock. The electrode distributes the lightning pulse, although the grounding resistance remains high.
|Rock is an insulator so do not drill holes in the rock to make a grounding.|
- Route the grounding cable from the grounding connector at the mast base to the most desirable direction away from the mast.
- Place a plate electrode on the surface of the rock.
- To make sure the plate stays in place even during winter and high winds, fix the plate to the rock with bolts or by putting soil and rocks on the corners of the plate.
- Guide and solder the electrode to the plate. The distance of the plate from the mast can vary depending on the characteristics of the site. Keep the electrode as short as possible.