Code Requirements for DB to plastic conduits with trench ground wire

[rayp1]

Situation:
Owner in a solar power plant desires:
a. Parallel large conductors 3 phase-34.5kV, 1250kcmil direct burial in a trench with a 4/0CU bare ground wire. (keep in mind each UG conductor has a 1/3 size jacketed concentric neutral.)
b. The direct burial cables are desired to be protected when terminating in equipment. Owner desire DB cables pass through PVC sch80 conduit sweeps only (90degree, 48inch radius) only under the pad mount gear entering each device.
c. Direct burial cable per owner at equipment with only sweep transition to 4-6inch conduits: the 3 conduits have 2 power cables planned per conduit per phase, AA, BB, CC and the last conduit for the 4/0CU bare conductor or the extra "EGC".

Questions:
1. Does this meet code?
2. Does each PHASE plastic ninety or sweep (only 48 inches) entering termination equipment require the installation of the 4/0CU ground cable?
3. Any other issues?

 

[Carultch]

Situation:
Owner in a solar power plant desires:
a. Parallel large conductors 3 phase-34.5kV, 1250kcmil direct burial in a trench with a 4/0CU bare ground wire. (keep in mind each UG conductor has a 1/3 size jacketed concentric neutral.)
b. The direct burial cables are desired to be protected when terminating in equipment. Owner desire DB cables pass through PVC sch80 conduit sweeps only (90degree, 48inch radius) only under the pad mount gear entering each device.
c. Direct burial cable per owner at equipment with only sweep transition to 4-6inch conduits: the 3 conduits have 2 power cables planned per conduit per phase, AA, BB, CC and the last conduit for the 4/0CU bare conductor or the extra "EGC".

Questions:
1. Does this meet code?
2. Does each PHASE plastic ninety or sweep (only 48 inches) entering termination equipment require the installation of the 4/0CU ground cable?
3. Any other issues?

Saving my place. I'm gonna research this question later.