We flipped the 220V circuit through the wall. It has a 40 Amp breaker on about 50' of what looks to be #6's.
There is a chart on top that is very worn from setting crap on top of it for decades. I can't read it. I tried Google, didn't find an image of what it looked like when new.
I think it's a reference for rod size...?
...bad spot for the chart...