I. General
770.1 Scope. The provisions of this article apply to the installation of optical fiber cables and raceways. This article does not cover the construction of optical fiber cables and raceways.
770.2 Definitions. See Article 100. For purposes of this article, the following additional definitions apply.
Abandoned Optical Fiber Cable. Installed optical fiber cable that is not terminated at equipment other than a connector and not identified for future use with a tag.
FPN: See Article 100 for a definition of Equipment.
Cable Sheath. A covering over the optical fiber assembly that includes one or more jackets and may include one or more metallic members or strength members.
Composite Optical Fiber Cable. These cables contain optical fibers and current-carrying electrical conductors.
Conductive Optical Fiber Cable. These optical fiber cables contain non-current-carrying conductive members such as metallic strength members, metallic vapor barriers, and metallic armor or sheath.
Exposed (to Accidental Contact). A conductive optical fiber cable in such a position that, in case of failure of supports or insulation, contact between the cable's non-current-carrying conductive members and an electrical circuit may result.
FPN: See Article 100 for two other definitions of Exposed.
Nonconductive Optical Fiber Cable. These optical fiber cables contain no metallic members and no other electrically conductive materials.
Optical Fiber Cable. A factory assembly of one or more optical fibers having an overall covering.
Optical Fiber Raceway. A raceway for enclosing and routing optical fiber cables.
FPN: See Article 100 for a definition of Raceway.
Point of Entrance. The point within a building at which the cable emerges from an external wall, from a concrete floor slab, or from a rigid metal conduit (Type
RMC) or an intermediate metal conduit (Type IMC) connected by a grounding conductor to an electrode in accordance with 770.100(B).
770.3 Other Articles. Circuits and equipment shall com- ply with 770.3(A) and (B). Only those sections of Chapter 2 and Article 300 referenced in this article shall apply to optical fiber cables and raceways.
(A) Composite Cables. Composite optical fiber cables shall be classified as electrical cables in accordance with the type of electrical conductors. They shall be constructed, listed, and marked in accordance with the appropriate article for each type of electrical cable.
(B) Ducts, Plenums, and Other Air-Handling Spaces. The requirements of 300.22 for electric wiring shall also apply to installations of optical fiber cables and raceways where they are installed in ducts or plenums or other space used for environmental air.
Exception: As permitted in 770.154(A).