I'm doing some electrical upgrades to my garage/workshop with upstairs apartment; I'm going to be replacing its 1960s-vintage subpanel which is fed by #4 wire from a 200 amp service entrance panel (on the house, about a 40 foot wire run).
While out shopping for a bench grinder (1970s Craftsman; I'll take 50 years old, a little rust, but Made in USA over brand-new cheap Chinese crap any day) I found that the seller had an old Miller welding machine which he was willing to let go for a reasonable price. It looks to be in decent condition but the power cord is deteriorated and will have to be replaced prior to use. I'll need to install a suitable outlet for it...nameplate specs are 230 volt, single phase, 37 amps. The plug currently on the machine is a NEMA 10-50P.
I'd rather not do any welding actually inside the garage, with perhaps rare exceptions. I was thinking of installing the new outlet on the outside of the garage, at the driveway, just 2 or 3 feet from the subpanel I'm replacing. I don't currently own an RV, but it strikes me that it would be ideal to install a receptacle which could be used either for the welder or for an RV.
Suggestions? (Also, suggestions for "tuning up" and safety checking the old Miller welder prior to first use are welcomed as well.)