75% of today's copper usage is due to its conductivity. Electrical energy is the most important common input of all economic activities, it is the main raw material. Here, the parallel importance of copper metal emerges. Rod earthers should be preferred, especially in places where the specific earth resistance decreases with depth.

Grounding rods, which are selected in appropriate sizes and in the number to provide the desired grounding resistance, should be driven vertically into the ground with the upper end at least 80 cm below the ground. In cases where more than one rod is driven, the distance between the two rods will be at least 2 times the length of the rod.