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Old 07-27-2008, 08:18 PM   #1
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wiring 50a 220 line

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.

Thanks for the input!
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Old 07-27-2008, 08:52 PM   #2
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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.


Last edited by Pudge565; 07-27-2008 at 08:55 PM.
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Old 07-27-2008, 10:44 PM   #3
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Is your armored cable type AC? If so, you're in luck. The cable armor can be used as the grounding conductor. See the National Armored Cable Manufacturers Association FAQ.
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