Installing NEMA 14-50 by use of NM-B in a Metal Flex conduit (dry location) code compliant?
While my measurements showed 0.5 inch diameter, the Southwire website suggests that NM-B is 0.67inches, and with using that as calculation it comes out as overfilled for 3/4 inch FMC.
So I ended up replacing the FMC with 1 inch Schedule 40 (gray) electrical PVC conduit.
All is well. Thanks everyone for feedback/help.