Sorry the pic is sideways. I can not figure out why that happened. Anyway I am stumped. I cant figure out why there are 2 70 amp breakers connected to each other. I have seen my share of split bus panels but this does not look like anything I have ever seen before. The bus bars look like they are one piece. From what I can see the SEC feeds both sides of the panel. Why the 70 amp double pole breakers?
Sorry I edited my post after I noticed that Roy had fixed the sideways photo. You cannot tell what it is unless you remove some of the circuit breakers to see the bus configuration. A split bus would have three 2-pole slots on each side.
Very strange setup. The two conductors from the top 70 amp CB are size #2 on the left and #4 on the right as they travel down next to the bus and behind the CB’s. When they emerge at the bottom the #4 is now on the left and the #2 is now on the right. I would love to see this with all of the CB’s removed.