The NEC Articles covering conduit start with Art. 342 and end with Art. 356. The first four conduits are the metal ones: You can use IMC and RMC in all atmospheric conditions and occupancies [Sec. 342 ...
In addition to the cable Articles, Chapter 3 of the NEC contains a sequence of Articles pertaining to raceways. The Art. 100 definition of raceway indicates that it is an enclosed channel designed ...