Depending on the design of the concrete foundations, either a foundation earthing rod or a ring earthing rod with a functional equipotential bonding conductor is required for earthing. Below are two standard details for ring earthing rods:
ring earthing rod with black tub
ring earthing rod with perimeter insulation
on all sides
Legend:
1 reinforced foundation
2b ring earthing rod
3 Connecting terminal 4
Connection lug
5 Functional potential connection conductor (connection to reinforcement ≤ 2 m)
6 Cleanliness layer
7 Design water level
8 Perimeter insulation
Source: bauwion
