Can Romex (NM-B) cable be run through conduit?

spark_sara

A few days ago I asked an electrician if I could run cable through conduit - he gave me a funny look and said "No, Romex is not allowed in conduit." When I searched online, there seems to be a wide belief that Romex cannot be run through conduit, but no one can find the code which states this. See for example here , here , or here . However, in...

Originally asked by BlueRaja - Danny Pflughoeft on Stack Exchange (diy) (CC BY-SA 4.0).

uphilltech

Good home-repair question — answering as the UphillTech team:

Yes, NM cable can be in conduit. In fact. NEC calls for it to be in conduit, when protection from physical damage is required. National Electrical Code 2011 ARTICLE 334 Nonmetallic-Sheathed Cable: Types NM, NMC, and NMS II. Installation 334.15 Exposed Work. In exposed work, except as provided in 300.11(A), cable shall be installed as specified in 334.15(A) through (C). (B) Protection from Physical Damage. Cable shall be protected from physical damage where necessary by rigid metal conduit, intermediate metal conduit, electrical metallic tubing, Schedule 80 PVC conduit, Type RTRC marked with...

Full answer by Tester101: https://diy.stackexchange.com/a/31150 (CC BY-SA 4.0).

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