I currently have a meter loop on my cabin that feeds a 125a main breaker panel. I'm working with the the utility provider to move the meter to a pole ~75ft away from the cabin and run a new underground feed West to the cabin breaker panel. Additionally I need to run power to a workshop that is 55' to the South of the new pole location. The workshop will be a 70amp breaker box. (10a lights, 3@20a for tools). My question is how do I configure the split? Is there a main disconnect panel set up for split feeds from the meter that I can use instead of the standard as shown in the diagram? Also, I have to use 3 lengths of 2-0 in conduit for the cabin 125a feed, what gauge works for the 70a workshop?
You can actually install two main disconnects below the meter. The NEC allows up to six main disconnects at one location so long as they are all marked as SERVICE DISCONNECT. These labels usually come with the equipment.
There are several ways you can do this but I have found the simplest to install an MLO (Main Lug Only) panel and then install the breakers to each building. The only qualifier is that you cannot have any more spaces than would allow more than six mains (6-2 pole breakers would equal 12 spaces or poles). If you have a problem finding a panel to match that configuration Then just instal a 125A MCB panel install the breakers to each building below the main.
Hope this helps and good luck.