here is what I have.
On the corner of my house, I have the main breaker box. I also have a 2nd sub panel that was installed later on the other side of the house which has 240V ac running to it. This panel has one breaker for a 120V ac light. That is it. Nothing else is connected.
I have a undeveloped area (about 140 feet away from the sub panel) that I would like to run 240V ac service to via underground conduit so I can use a 240V ac electric stove for outdoor kitchen.
My question is: Can I install a new sub panel from the undeveloped area utilizing the existing sub panel or do I need to go directly from the main panel? If I can then can I just run 2 wires from the panel and install a ground rod at the new area?
[additional pictures from OP's link added in:]