Grounding

Professionally implemented grounding system for the safe conduction of lightning into the ground.

By installing a grounding system customised to your needs, we ensure that the captured lightning current is safely discharged into the ground and that potential equalisation is established between the down conductor system and a potential control system on the property. For potential control, your grounding system is connected to the down conductors of the external lightning protection on the one hand and to the power distribution and internal lightning protection on the other.

One of the main requirements of our highly qualified and experienced planning and installation teams is the realisation of a common grounding system for the various electrical systems of your property, which is connected to the main equipotential bonding system. With regard to earth electrode selection, we check the optimum earth electrode type for lightning protection for you as part of the planning process, which is suitable in view of your structural system, the local conditions and environmental factors.

Types of lightning protection standard

The VDE 0185-305-3 lightning protection standard distinguishes between two different types of earth electrodes:

  • Type A requires individually arranged surface or underground earth electrodes. Surface earth electrodes are laid parallel to the ground surface at depths from 0.5 m to a maximum of one metre. They consist of strip, round materials or cables and are often used where there are already good conductive soil layers.
    Depending on the ground conditions, earth electrodes are generally installed at greater depths. Earth electrode lengths of 9 metres have proven to be advantageous. Deep earth electrodes have the advantage of reaching layers of earth at greater depths whose specific resistance is usually lower than in areas close to the surface.
    • Type B includes ring earth electrodes around the object or foundation earth electrodes.
      Foundation earth electrodes are arranged as closed rings in the surrounding foundations of the building. They are often favoured because they are embedded in the concrete and therefore resistant to corrosion in the long term. In addition, due to the concrete shell, they have low resistance to soil spreading and have a potential equalising effect.
      Ring earth electrodes are laid in a ring around the building at a distance of around one metre below and therefore outside the foundation. They are made of bent steel strip. DIN 18014 requires ring earth electrodes for buildings whose basements include measures for thermal insulation or against water ingress.
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