CommScope Trunk & Distribution Cable - Manual (Page 62)

NEC Articles 820
NEC article 820 deals with broadband coaxial cable. Traditional coax networks carry a low-voltage radio
frequency (RF) signal. The voltage is so low that it is not considered dangerous. NEC article 820 is written with
fire safety, not voltage, in mind.
Look for the cable rating on the jacket. The cable ratings are:
Plenum-rated cables, designed for use in plenums, ducts and air handling
spaces, carry the strictest NEC rating.
Riser-rated cables are used in vertical shafts that penetrate more than one
floor.
General purpose-rated cables may be used in locations other than plenums
or risers.
Residential-rated cables are for use in one, two and multi-family dwellings
and in raceways.
Buried cables are for use underground alone or in conduit. This rating only
concerns NEC 830 applications.
8.3 Appendix
NEC and Other Ratings