Welding of earthing sockets using the aluminothermic process

Exothermic welding is a welding process at extremely high temperatures, based on chemical reactions that release significant amounts of heat. This is a fundamental process in making electrical connections, especially in the installation of earthing sockets, where high strength and long-term reliability are required. This article explores the physicochemical principles of exothermic welding, the processes involved, as well as their applicability in the creation of earthing sockets, taking into account relevant technical regulations and industry standards. In this paper, six exothermic welded joints between copper sheet and electrode will be analyzed, on which electrical contact resistance measurements will be made. The aim is to determine how the electrical contact resistance is influenced by the material from which the parts that are aluminothermically welded to make earthing sockets are made.