The version if this diagram I have has a RIMS tube wired in. In mine I use 3 PIDs - HLT, RIMS, and BK.
You've subbed to my build thread, check the 2nd post. That's the diagram I used. The only thing different is I substituted 4500w 240v elements for the 5500w 240v elements.
With these specs I am able to brew back to back batches, with the RIMS and 2 pumps running and remain under the 50a limit.
With 30a you won't be able to brew back to back.
5500w 240v = 22.9a
4500w 240v = 18.7a
2000w 240v = 8.3a
Running 2 5500w 240v elements at the same time plus RIMS will put you over 50a.
Running 2 4500w 240v elements at the same time plus RIMS will put you about 46a. About an amp or so for your pumps and you're still under the 50am.