I am running an 80A (4AWG Copper) line for EV charging in my garage. I am using EMT conduit and I need to transition through drywall. Since the studs are not deep enough (2x4) for the minimum radius turn to fit, can I put an LB conduit body on both sides of the wall to effect the transition? It seems to be code according to NEC, but it's exploiting an exception back-to-back, namely:
NEC 314.28(A)(1): for 4 AWG or larger conductors the distance from a conductor's entry to a "box" and the opposite wall must be at least 6 times the raceway size - 1" EMT in this case, so 6" - except if the opposite wall is a removable cover. So I'd be exploiting this exception twice with essentially zero intermediate cable run.
GARAGE ---------- <--- removable cover for LB conduit body #2 ________________ LB conduit | .................... 4AWG conductors body #2 ----->| . ____________ ================| . |========================== <--- drywall _________| . | 4AWG .............. | <-- LB conduit body #1 _____________| ---------- <--- removable cover for LB conduit body #1