FOUNDATIONAL GROUNDING

In all our constructions we use foundational grounding in order to achieve the following:

•Low ground resistance.
•Creation of equipotential surface
•Protection of the electrode from erosion due to its boxing in concrete.
•Pending wires for the direct grounding of the engine room, boiler room, electric supply, lightning conductor, pumping station etc.
•Βy inserting the electrodes deep enough under the foundations the resistance value is not affected by the changes in humidity and temperature.
•Τhe foundational grounding is made of grounding of strips or conductors which are encased in the concrete foundation.
•The strips are placed along the side and across the width of the foundation forming closed loops.
•Αlong with all the above, for additional assurance, we construct intermediate conductors, forming more closed loops. Thus, even if a conductor opens up at one point, the whole loop will not open.
•Τhe conductors are placed on the outer outline of the building so that they cover the largest possible surface.
•Τhe value of the grounding resistance is inversely proportional to the area occupied by the grounding.
•Τhe grounding strip is placed vertically in the foundations, with the smallest dimension downwards.
•Τhe uprights are fixed into the ground securing the conductor or the strip at the desired horizontal level, ensuring, thereby, that at concreting they will be surrounded on all sides by at least a 5cm wide concrete wall.
•The foundational grounding that we have been applying on all of our constructions for the past thirty years has finally become mandatory by law (ΦΕΚ 1225/05-09-2006). Under this law, all newly-constructed buildings with internal electric installation must have foundational grounding.

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