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The AC Component of Direct Current Arc Welding Machines
It is widely believed internationally that at the same no-load voltage (or OCV) alternating current (AC) arc welders are more electrically hazardous than direct current (DC) machines. In some standards AC welding machines are limited to less than 25V (rms) for wet location welding whereas for the same work, DC machines of up to 70V (plus 10% ripple) are allowed. Other standards allow the use of up to 113V peak when using a DC welder in an environment with an increased risk of electrical shock.
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