I know this has been covered but id rather be safe than sorry. Il be running a mm200 off of a dryer plug, 4 prong with 2 straight side posts one l shaped and a circle, to the welder plug. Ive seen everything from having to spending 80 for the wire to taking a dryer plug cable and capping the neutral wire and hooking rest to a welder receptacle.. ive also considered changing the plug on my machine to a 4 prong. Which is better? Any advice? Also i know doing this isnt ideal but I live in a rental house and cant wire in a dedicated 220v 50a breaker