Running from a new 200amp main interior in the attached garage, out a 150 amp breaker into 4/0 cable (4/0-4/0-4/0-2/0 assumed). The cable will travel about 30 feet inside through raceways and EMT (2in), then travel outside another 50 feet straight run also in EMT (2in). The EMT will get within 6 inches of the earth at the closest point (about 2 feet of travel), never terminating or touching/buried the earth.
Finally the cable will enter an exterior JBox where it will splice down to 1/0 Cu before re-entering the basement (also in EMT). Why the 1/0 splice you ask? I want to future-proof the main run with 4/0 Al so I could go up to 200amp in the future, but I can't use 4/0 into the existing 100A subpanel (the old main). So the 1/0 Cu is the perfect ampacity intersection between a 150A feeder breaker that can take 4/0 and the 100A subpanel. So even though it will initially be fused to 150A feeding a 100A panel, I want to size to a day when I replace the 150 feeder and 100a subpanel with 200 all the way (and replace the 1/0 Cu with 2/0 Cu).
Problems: NEC 338.12(B)(2): USE cable cannot be use for interior, and must terminate in outdoors enclosure. -- So this type is a no-go for the interior garage run.
SE and SER: (Can't run in the EMT at 90C from what I understand.)