Foundation grounding is one of the most healthy grounding methods. Foundation grounding of buildings must be started at the beginning of construction, i.e. foundation stage. It is performed by installing a galvanized conductor between the reinforcing bars in the foundation. This conductor is connected to reinforcing bars at certain distances. The ends of the grounding conductor are taken out from some specified points and left as the connection bud. Once these ends are connected to the equipotential grounding bus bars, the grounding is completed by connecting all systems to be grounded to these buses.
Foundation grounding must be performed in the form of a closed ring, and placed in the foundation of the external walls of the building, or the foundation platform. In buildings with a large perimeter, foundation grounding rods must be divided into sections of 20x20m. Connection must be established with reinforcing bars every few meters.
An example of the installation of a foundation grounding rod in a foundation with no iron mesh (non-reinforced):
1. Ground
2. Insulation layer
3. Connection bud of at least 150cm
4. External wall of basement
5. Ground concrete
6. Blockage
7. Foundation grounding
8. Distance piece
9. Foundation
10. Drainage
An example of the installation of a foundation grounding rod in a foundation with iron mesh (reinforced):
1. Ground
2. Insulation layer
3. Connection bud of at least 150cm
4. External wall of basement
5. Foundation concrete
6. Blockage
7. Foundation grounding rod connected to the iron mesh at 2m distances in order to stabilize its location
8. Drainage