Purpose This specification provides a standard for the manufacture@ performance@ inspection@ reliability and procurement of a series of manual gas metal arc welding equipment. This standard lists minimum req??irements and is not to limit design advances. Classification The machine shall be of the following types@ sizes and classes. Type I DC Constant Potential II DC Constant Current III DC Short Circuiting Arc IV DC Pulsed Power Size All equipment shall be rated according to maximum current and to current at 100% (continuous) and 60% duty cycles in addition to the following noted dimensions. Power Source - current Welding gun - Current at continuous duty Filler Metal Feeder - in inches per minute and diameter of hard and soft filler wire. Class Commercial Hardware - stock item Modified Commercial Hardware Custom Hardware