Grounding is a conductive component that conducts electrical currents into the ground. An earthing can be carried out as a foundation earthing rod in the concrete, as a ring earthing rod around the building or as a rod, deep or plate earthing rod. Since all earthing rods installed in the ground are highly exposed to corrosion, a foundation earthing rod is mandatory for all new buildings. This is to be planned in accordance with DIN 18014 and improves the effectiveness of the protective equipotential bonding. It conducts earth fault currents and protective conductor currents to earth and can also serve as part of a lightning protection system.
Instead of a foundation earther, a ring earthing rod can also be laid in the ground if a concrete foundation is designed with an increased earth transition resistance for structural reasons (e.g. white tank, perimeter insulation). In this case, however, a functional equipotential bonding conductor must also be laid in the foundation, which corresponds in function to a foundation earthing rod.
Source: bauwion
