This video is presented for entertainment purposes only. Design, build, and/or use a device like this solely at your own risk
WeldingWeb Thread here:
https://weldingweb.com/showthread.php?11537-HOW-TO-make-a-220V-extension-cord
Or you can just buy one:
https://lmgtfy.com/?q=220V+Extension+Cord+for+Welder
https://www.waterworkstraining.com/products/Flanged_Fitting_Assembly.php – Training and Installation “The Basics” lesson 9 shows how to correctly inspect and clean all the parts to be installed, assembly of one flange to another and the importance of tightening the bolts in an alternating pattern.