What is the recommended electrical connection for a 220v 200amp A/C -
300 amp DC welder ?Is a GFCI outlet sufficient ? If no, what then ?
The vendor offers a maximum power cable of 75'. Is this actually the maximum that can be safely/properly used ?
Any other recommendations appreciated,
Courtney Thomas
The specific model would be helpful here.
Most likely a NEMA 6-50 receptacle connected to a 40 or 50 amp breaker with appropriately sized wire. For 50 amp breaker, use two 6 gauge copper conducters and a 10 gauge (or larger) ground. Check the manual &/or manufacturer or read the name plate on the machine.
You do not need GFCI for a welder. The receptacle listed above can be obtained from any big box store or electrical supply house for under $20.
I would keep the power cord as short as possible, but as long as it needs to be. Do you really need 75' ? FYI it can be as long as you want so long as the voltage drop is not excessive. Longer run equals larger wire to reduce voltage drop. This can get expensive obviously.
A look through the archives will give lots of info on wiring a welder.
Hope this helps.
Jeff Dantzler
It's a Miller Shopmaster 300 AC/DC with the HF TIG accessory.
Thank you Jeff.
Jeff Dantzler wrote:
PolyTech Forum website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.