COMMUNICATIONS CIRCUITS

A. General 800-1. Scope. This article covers telephone, telegraph (except radio), outside wiring for fire alarm and burglar alarm, and similar central station systems; and telephone systems not connected to a central station system but using similar types of equipment, methods of installation, and maintenance. (FPN No. 1): For further information for fire alarm, guard tour, sprinkler waterflow, and sprinkler supervisory systems, see Article 760. (FPN No. 2): For installation requirements of optical fiber cables, see Article 770. 800-2. Definitions. See Article 100. For purposes of this article, the following additional definitions apply: Cable: A cable is a factory assembly of two or more conductors having an overall covering. Cable Sheath: A sheath is a covering over the conductor assembly that may include one or more metallic members, strength members, or jackets. Point of Entrance: The point of entrance within a building is the point at which the wire or cable emerges from an external wall, from a concrete floor slab, or from a rigid metal conduit or an intermediate metal conduit grounded to an electrode in accordance with Section 800-40(b). Wire: A wire is a factory assembly of one or more insulated conductors without an overall covering. 800-3. Hybrid Power and Communications Cables. The provisions of