I fitted a 30A to my MTS250S to use .045 wire and .062 it works just fine thanks to Yofish to tell me which 30A to buy. Cut the end off the power and put it on to the EURO end just and a brass fitting to join then together. Cut the plug off and rewired it to the MTS250S plug. Set the welder to old spec's and did a test run adjusted the setting and welded heaver aluminum come out just fine and the gun did not even get hot.