Answer
Aug 05, 2026 - 12:24 PM
No, Romex (NM cable) should not be run inside flexible metal conduit (FMC). The National Electrical Code (NEC) prohibits this because the insulation and sheathing on Romex are not rated for use inside conduit, which can lead to overheating and other safety hazards. Always use conductors rated for conduit when installing wiring in FMC.
