Mustang...where to you get the term IMMEDIATELY in the code book?

I see the terms NEAREST and READILY ACCESSIBLE when refering to the location of the service disconnecting means as in 230.70 and building disconnecting means refered to in 225.32

If you have overcurrent protection on the feeder at the CSED,then I don't see a major problem with locating the building disconnecting means further in the building as you have described.

If the concrete floor isn't poured yet...you could continue the underground feeder under the floor to your desired location and pour concrete over it which will make the feeder still outside of the building...see 230.6

shortcircuit