Is there a specific standard that recognises the use of exothermic welding in the installation of earthing systems? And are there standards that apply to the design and verification of the earthing systems themselves? The answer is yes in both cases. The main international standards explicitly recognise exothermic welding as a valid connection method, precisely because of the reliability and durability it provides compared to other solutions. Likewise, the regulatory framework for earthing systems covers the entire cycle: from measuring soil resistivity through a geoelectrical study, to safety, sizing, installation and periodic verification requirements.