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The best and most appropriate way to connect underground conductors Earthing systems, Cad Weld is exothermic welding connection method. This method has a greater connection to make calls and connect the conductors increases the hotspot resistance against corrosion. Thus, while reducing system cost, lifetime and reliability is high. The IEEE 837 standards can be used as reference. Connect using special welding mold, powder and explosives, explosive welding is done. Welding molds of graphite as standard and is suitable for welding at least 50. Welding template for any type of connection depending on the type, shape and size conductor connection is available and for specific connections can be made.