800.47 deals with underground cables entering into a building, 800.110 is for cables inside buildings.
800 Section V - Installation Methods Within Buildings
800.110 Raceways for Communication Wires and Cables
800.110(A) Types of Raceways
Communication wires and cables shall be permitted to be installed in any raceway that complies with either (A)(1) or (A)(2).
(1) Raceways recognized in Chapter 3
Communications wires and cables shall be permitted to be installed in any raceway included in Chapter 3. The raceways shall be installed in accordance with the requirements of Chapter 3.
(2) Other permitted raceways
Communications wires and cables shall be permitted to be installed in listed Plenum communication raceway, listed riser communication raceway, or listed general purpose communication raceway selected in accordance with the provisions of 800.113 and installed in accordance with 362.24 through 362.56, where the requirements applicable to electrical non-metallic tubing apply.
800.113 (A) Listing
Communication wires, cables, and raceways installed in buildings shall be listed.

I do not see anywhere other than 800.47 any exceptions that would allow for cables not 'wet-location' rated to be installed in conduit in a slab inside of a building. Quite the opposite as 800.113 (A) requires all communication cables installed inside of a building to be listed.