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Some considerations regarding different earthing electrodes types and arrangements are discussed. The computation of the earthing resistance and voltage distribution, the designing, installation and testing procedures are evaluated and compared. Typical mistakes, inadvertences, wrong or incomplete procedures are outlined, e.g. the soil resistivity is very rarely measured before the designing step; the foundation earthing systems is not required at least for new buildings but an option for artificial electrodes; incorrect burial depth and in a lot of cases distances between vertical rods are observed; inconsistent design and more probably empiric electrodes arrangements; irrelevant testing procedures (regarding the earthing resistance and step and touch voltages). Finally, recommendations for improving the quality in earthing systems for low-voltage electrical installations are completed.
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