Q. How much voltage required for spot welding machines?

Answer

Common settings for spot welding machines are 5 to 22 volts and 1000 to 10000 amperes. Spot welding equipment designed for industrial usage often require three-phase electricity due to the large peak currents they require. In particular it is employed for spot welding aluminum sheets used in boilers and tubes. AC electricity is typically used to power spot welders. High currents at low voltages are possible with AC power thanks to the use of a transformer. Spot welding equipment consists of a power transformer welding electrodes and other parts that allow for regulation of weld current pressure voltage and so on.