Sandkist

According to the manual for your welder, Dynasty 200 DX, your machine can use an input voltage of 120 to 460 volts single or three phase and will auto sense whatever input voltage you are connecting so no internal wiring changes are necessary.  Since this is a residential setting, it is most likely that you have either 120 volt single phase or 240 volt single phase available for power. The four prong plug you have is a three phase plug and should be removed and replaced with a 120 or 240 volt single phase plug. 120 and 240 volt plugs (actually rated at 125 or 250 volts)  are available in many amperages. Can you post a picture of the face of the existing receptacle you want to use and a picture of the circuit breaker handle? This will clarify what you actually have installed and determine if you have the correct amperage receptacle and circuit breaker installed for your machine and that will tell you what amperage and voltage plug you need to install.

Do you have a picture of the nameplate of your welder?

8 years on mine and probably could have easily gone ten. Switched from the M154s to M170s this time. Only downside on the Toyos is that they tend to smell like dog crap LOL

What did you get? M154s? You’ll like the Toyos compared to the Michelin

3 minutes ago, sndsamplr said:

Is that in Glamis sandkist?

Sort of, Glamis but not in the dunes.