The basic working principle of the welding is commonly used with 220V or 380V industrial electricity, Welding Rods where the pressure reducer to reduce the voltage, and enhance the current, and electrical energy to produce a huge arc heat to melt steel. Welding rod into the fusion between the iron and steel higher. (Medicine, Welding Electrodes the outer skin from the very large role, do not believe you knock the powder to see can be welded not). Of course, this explanation is popular.