Chapter 3

Nonmetallic Extensions Part I. General Scope. This article covers the use, installation, and construction specifications for nonmetallic extensions. Definitions. Concealable Nonmetallic Extension. A listed assembly of two, three, or four insulated circuit conductors within a nonmetallic jacket, an extruded thermoplastic covering, or a sealed nonme‐ tallic covering. The classification includes surface extensions intended for mounting directly on… read more »

Multioutlet Assembly Part I. General 380.1 Scope. This article covers the use and installation requirements for multioutlet assemblies. Informational Note: See the definition of multioutlet assembly in Article 100. Part II. Installation 380.10 Uses Permitted. The use of a multioutlet assembly shall be permitted in dry locations. 380.12 Uses Not Permitted. A multioutlet assembly shall not be installed… read more »

Nonmetallic Wireways Part I. General Scope. This article covers the use, installation, and construction specifications for nonmetallic wireways and associ‐ ated fittings. Definition. Nonmetallic Wireways. Flame-retardant, nonmetallic troughs with removable covers for housing and protecting electrical wires and cables in which conductors are laid in place after the raceway has been installed as a complete system. 378.6… read more »

Metal Wireways Part I. General Scope. This article covers the use, installation, and construction specifications for metal wireways and associated fittings. Definition. Metal Wireways. Sheet metal troughs with hinged or remova‐ ble covers for housing and protecting electrical wires and cable and in which conductors are laid in place after the raceway has been installed as a… read more »

Cellular Metal Floor Raceways Part I. General Scope. This article covers the use and installation requirements for cellular metal floor raceways. Definitions. Cellular Metal Floor Raceway. The hollow spaces of cellular metal floors, together with suitable fittings, that may be approved as enclosed channel for electrical conductors. Cell. A single enclosed tubular space in a cellular metal floor member,… read more »

Cellular Concrete Floor Raceways Part I. General Scope. This article covers cellular concrete floor race‐ ways, the hollow spaces in floors constructed of precast cellular concrete slabs, together with suitable metal fittings designed to provide access to the floor cells. Definitions. Cell. A single, enclosed tubular space in a floor made of precast cellular concrete slabs, the direction… read more »

Cablebus Part I. General Scope. This article covers the use and installation requirements of cablebus and associated fittings. Definition. Cablebus. An assembly of units or sections with insulated conductors having associated fittings forming a structural system used to securely fasten or support conductors and conductor terminations in a completely enclosed, ventilated, protective metal housing. This assembly is… read more »

Busways Part I. General Requirements Scope. This article covers service-entrance, feeder, and branch-circuit busways and associated fittings. Definition. Busway. A raceway consisting of a metal enclosure containing factory-mounted, bare or insulated conductors, which are usually copper or aluminum bars, rods, or tubes. Informational Note: For cablebus, refer to Article 370. Part II. Installation 368.10 Uses Permitted. Busways shall be permitted… read more »

Auxiliary Gutters Part I. General Scope. This article covers the use, installation, and construction requirements of metal auxiliary gutters and nonmetallic auxiliary gutters and associated fittings. Definitions. Metal Auxiliary Gutter. A sheet metal enclosure used to supplement wiring spaces at meter centers, distribution centers, switchgear, switchboards, and similar points of wiring systems. The enclosure has hinged or removable covers for… read more »

Electrical Nonmetallic Tubing: Type ENT Part I. General Scope. This article covers the use, installation, and construction specifications for electrical nonmetallic tubing (ENT) and associated fittings. Definition. Electrical Nonmetallic Tubing (ENT). A nonmetallic, pliable, corrugated raceway of circular cross section with integral or associated couplings, connectors, and fittings for the installa‐ tion of electrical conductors. ENT is… read more »