I have a welder that I need a 50amp 220 service for. I already have 8/3 armored cable that is plenty long to make the run, however there is no ground wire. Is there no ground in this application? If I do need a ground can I run a green 8awg line with the BX for ground? I included a pic of the plug on the end of the welder.
yes that plug needs a ground anytime you see a round prong it needs a ground but I am not sure about how to run it since I am only in school yet but i would think that you can't run it with the ac or mc seperatly.