830-Network-Powered Broadband Communications Systems

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I. General

signal circuits. The NIU may also contain primary and secondary protectors.

Network-Powered Broadband Communications Circuit. The circuit extending from the communications utility's serving terminal or tap up to and including the NIU.

FPN: A typical single-family network-powered communications circuit consists of a communications drop or communications service cable and an NIU and includes the communications utility's serving terminal

830.1 Scope. This article covers network-powered

broad band communications systems that provide any
combination of voice, audio, video, data, and
interactive services through a network interface unit.
FPN No. 1: A typical basic system configuration includes a cable supplying power and broadband signal to a network interface unit that converts the broadband signal to the component signals. Typical cables are coaxial cable with both broadband signal and power on the center conductor, composite metallic cable with a coaxial member for the broadband signal and a twisted pair for power, and composite optical fiber cable with a pair of conductors for power. Larger systems may also include network components such as amplifiers that require network power.
FPN No. 2: See 90.2(B)(4) for installations of broadband communications systems that are not covered.

830.2 Definitions. See Article 100. For purposes of this article, the following additional definitions apply.

Abandoned Network-Powered Broadband Communica- tions Cable. Installed network-powered broadband communications 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.

Block. A square or portion of a city, town, or village en- closed by streets, including the alleys so enclosed but not any street.

Exposed (to Accidental Contact). A circuit in such a po- sition that, in case of failure of supports or insulation, contact with another circuit may result.

FPN: See Article 100 for two other definitions of Exposed.

Fault Protection Device. An electronic device that is in- tended for the protection of personnel and functions under fault conditions, such as network-powered broadband communications cable short or open circuit, to limit the current or voltage, or both, for a low-power network-powered broadband communications circuit and provide acceptable protection from electric shock.

Network Interface Unit (NIU). A device that converts a broadband signal into component voice, audio, video, data, and interactive services signals. The NIU provides isolation between the network power and the premises

or tap where it is not under the exclusive control of
the communications utility.

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 830.100(B).

830.3 Other Articles. Circuits and equipment shall com- ply with 830.3(A) through (D).

(A) Hazardous (Classified) Locations. Network-powered broadband communications circuits and equipment in- stalled in a location that is classified in accordance with

500.5 shall comply with the applicable requirements of
Chapter 5.

(B) Ducts, Plenums, and Other Air-Handling Spaces. Section 300.22 shall apply where installed in ducts, ple- nums,

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