Need 240V in the shop, is it already in this OLD panel box?

RustyRatRod said
That appears to be wired for 110V. Black hot, white common and green ground. Only one leg. Black. I have 100amp service in my shop run with 2/0 2/0 4/0 100amp wire.

the panel is fed with 220/240 on the main breaker the four circuits are 110/120.