The main reasons for welding the ground wire of power cables are as follows:
Safety considerations: Grounding can prevent the metal sheaths of electrical equipment and cables from becoming charged, thereby avoiding electrical shock accidents when people come into contact with them.
Protect against lightning strikes and overvoltages: Grounding can divert lightning or operational overvoltages to the earth, protecting cables and equipment from damage.
Prevent electromagnetic interference: Grounding can reduce the impact of electromagnetic interference on surrounding equipment and personnel.
Prevent insulation breakdown: When insulation breakdown occurs in a cable or a large fault current flows through the core, the induced voltage of the metal sheath may cause the inner liner to break down, causing an electric arc until the metal sheath is melted into a hole. Grounding can prevent this from happening.
Extended service life: Welding the ground wire can reduce the electrical stress on the cable, reduce the risk of cable aging and damage, and thereby extend the service life of the cable.
Therefore, during the installation and maintenance of power cables, welding the ground wire is a very important task.
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