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Zane Meyers
2026-01-07 17:01:31 -05:00
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nfpa-70_dump_wiring-methods.md
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@@ -24,7 +24,7 @@ This article covers the use, installation, and construction specifications for a
The definition in this section shall apply within this article and throughout the Code.
Armored Cable, Type AC.
#### Armored Cable, Type AC.
A fabricated assembly of insulated conductors in a flexible interlocked metallic armor. See 320.100.
@@ -169,7 +169,7 @@ This article covers the use, installation, and construction specifications for f
The definition in this section shall apply within this article and throughout the Code.
Flat Cable Assembly, Type FC.
#### Flat Cable Assembly, Type FC.
An assembly of parallel conductors formed integrally with an insulating material web specifically designed for field installation in surface metal raceway.
@@ -282,38 +282,38 @@ This article covers a field-installed wiring system for branch circuits incorpor
The definitions in this section shall apply only within this article.
Bottom Shield.
#### Bottom Shield.
A protective layer that is installed between the floor and Type FCC flat conductor cable to protect the cable from physical damage and may or may not be incorporated as an integral part of the cable.
Cable Connector.
#### Cable Connector.
A connector designed to join Type FCC cables without using a junction box.
FCC System.
#### FCC System.
A complete wiring system for branch circuits that is designed for installation under carpet squares.
> [!info] Informational Note:
> The FCC system includes Type FCC cable and associated shielding, connectors, terminators, adapters, boxes, and receptacles.
Insulating End.
#### Insulating End.
An insulator designed to electrically insulate the end of a Type FCC cable.
Metal Shield Connections.
#### Metal Shield Connections.
Means of connection designed to electrically and mechanically connect a metal shield to another metal shield, to a receptacle housing or self-contained device, or to a transition assembly.
Top Shield.
#### Top Shield.
A grounded metal shield covering under-carpet components of the FCC system for the purposes of providing protection against physical damage.
Transition Assembly.
#### Transition Assembly.
An assembly to facilitate connection of the FCC system to other wiring systems, incorporating (1) a means of electrical interconnection and (2) a suitable box or covering for providing electrical safety and protection against physical damage.
Type FCC Cable.
#### Type FCC Cable.
Three or more flat copper conductors placed edge-to-edge and separated and enclosed within an insulating assembly.
@@ -494,7 +494,7 @@ This article covers the use, installation, and construction specifications for i
The definition in this section shall apply within this article and throughout the Code.
Integrated Gas Spacer Cable, Type IGS.
#### Integrated Gas Spacer Cable, Type IGS.
A factory assembly of one or more conductors, each individually insulated and enclosed in a loose fit, nonmetallic flexible conduit as an integrated gas spacer cable rated 0 volts through 600 volts.
@@ -613,7 +613,7 @@ This article covers the use, installation, and construction specifications for p
The definition in this section shall apply within this article and throughout this Code.
Power and Control Tray Cable, Type TC.
#### Power and Control Tray Cable, Type TC.
A factory assembly of two or more insulated conductors, with or without associated bare or covered equipment grounding conductors, under a nonmetallic jacket.
@@ -754,7 +754,7 @@ This article covers the use, installation, and construction specifications for u
The definition in this section shall apply within this article and throughout the Code.
Type P. Cable
#### Type P. Cable
A factory assembly of one or more insulated flexible tinned copper conductors, with associated equipment grounding conductor(s), with or without a braided metallic armor and with an overall nonmetallic jacket.
@@ -840,7 +840,7 @@ This article covers the use, installation, and construction specifications for u
The definition in this section shall apply within this article and throughout the Code.
Underground Feeder and Branch-Circuit Cable, Type UF.
#### Underground Feeder and Branch-Circuit Cable, Type UF.
A factory assembly of one or more insulated conductors with an integral or an overall covering of nonmetallic material suitable for direct burial in the earth.
@@ -939,7 +939,7 @@ This article covers the use, installation, and construction specifications for i
The definition in this section shall apply within this article and throughout the Code.
Intermediate Metal Conduit (IMC).
#### Intermediate Metal Conduit (IMC).
A steel threadable raceway of circular cross section designed for the physical protection and routing of conductors and cables and for use as an equipment grounding conductor when installed with its integral or associated coupling and appropriate fittings.
@@ -1101,7 +1101,7 @@ This article covers the use, installation, and construction specifications for r
The definition in this section shall apply within this article and throughout the Code.
Rigid Metal Conduit (RMC).
#### Rigid Metal Conduit (RMC).
A threadable raceway of circular cross section designed for the physical protection and routing of conductors and cables and for use as an equipment grounding conductor when installed with its integral or associated coupling and appropriate fittings.
@@ -1297,7 +1297,7 @@ This article covers the use, installation, and construction specifications for f
The definition in this section shall apply within this article and throughout the Code.
Flexible Metal Conduit (FMC).
#### Flexible Metal Conduit (FMC).
A raceway of circular cross section made of helically wound, formed, interlocked metal strip.
@@ -1509,7 +1509,7 @@ This article covers the use, installation, and construction specifications for l
The definition in this section shall apply within this article and throughout the Code.
Liquidtight Flexible Metal Conduit (LFMC).
#### Liquidtight Flexible Metal Conduit (LFMC).
A raceway of circular cross section having an outer liquidtight, nonmetallic, sunlight-resistant jacket over an inner flexible metal core with associated couplings, connectors, and fittings for the installation of electric conductors.
@@ -1643,15 +1643,13 @@ LFMC shall be marked according to 110.21. The trade size and other information r
This article covers the use, installation, and construction specifications for high density polyethylene (HDPE) conduit and associated fittings.
> [!info] Informational Note:
> Refer to Article 352 for Rigid Polyvinyl Chloride Conduit: Type PVC and Article 355 for Reinforced Thermosetting
Resin Conduit: Type RTRC.
> Refer to Article 352 for Rigid Polyvinyl Chloride Conduit: Type PVC and Article 355 for Reinforced Thermosetting Resin Conduit: Type RTRC.
### 353.2 Definition.
The definition in this section shall apply within this article and throughout the Code.
High Density Polyethylene (HDPE) Conduit.
#### High Density Polyethylene (HDPE) Conduit.
A nonmetallic raceway of circular cross section, with associated couplings, connectors, and fittings for the installation of electrical conductors.
@@ -1776,7 +1774,7 @@ This article covers the use, installation, and construction specifications for n
The definition in this section shall apply within this article and throughout the Code.
Nonmetallic Underground Conduit with Conductors (NUCC).
#### Nonmetallic Underground Conduit with Conductors (NUCC).
A factory assembly of conductors or cables inside a nonmetallic, smooth wall raceway with a circular cross section.
@@ -1919,15 +1917,13 @@ Identification of conductors or cables used in the assembly shall be provided on
This article covers the use, installation, and construction specification for reinforced thermosetting resin conduit (RTRC) and associated fittings.
> [!info] Informational Note:
> Refer to Article 352 for Rigid Polyvinyl Chloride Conduit: Type PVC, and Article 353 for High Density Polyethylene
Conduit: Type HDPE.
> Refer to Article 352 for Rigid Polyvinyl Chloride Conduit: Type PVC, and Article 353 for High Density Polyethylene Conduit: Type HDPE.
### 355.2 Definition.
The definition in this section shall apply within this article and throughout the Code.
Reinforced Thermosetting Resin Conduit (RTRC).
#### Reinforced Thermosetting Resin Conduit (RTRC).
A rigid nonmetallic raceway of circular cross section, with integral or associated couplings, connectors, and fittings for the installation of electrical conductors and cables.
@@ -2195,7 +2191,7 @@ This article covers the use, installation, and construction specifications for l
The definition in this section shall apply within this article and throughout the Code.
Liquidtight Flexible Nonmetallic Conduit (LFNC).
#### Liquidtight Flexible Nonmetallic Conduit (LFNC).
A raceway of circular cross section of various types as follows:
@@ -2342,7 +2338,7 @@ This article covers the use, installation, and construction specifications for e
The definition in this section shall apply within this article and throughout the Code.
Electrical Metallic Tubing (EMT).
#### Electrical Metallic Tubing (EMT).
An unthreaded thinwall raceway of circular cross section designed for the physical protection and routing of conductors and cables and for use as an equipment grounding conductor when installed utilizing appropriate fittings.
@@ -2516,7 +2512,7 @@ This article covers the use, installation, and construction specifications for f
The definition in this section shall apply within this article and throughout the Code.
Flexible Metallic Tubing (FMT).
#### Flexible Metallic Tubing (FMT).
A metal raceway that is circular in cross section, flexible, and liquidtight without a nonmetallic jacket.
@@ -2645,7 +2641,7 @@ This article covers the use, installation, and construction specifications for e
The definition in this section shall apply within this article and throughout the Code.
Electrical Nonmetallic Tubing (ENT).
#### Electrical Nonmetallic Tubing (ENT).
A nonmetallic, pliable, corrugated raceway of circular cross section with integral or associated couplings, connectors, and fittings for the installation of electrical conductors. ENT is composed of a material that is resistant to moisture and chemical atmospheres and is flame retardant.
@@ -2819,13 +2815,13 @@ This article covers the use, installation, and construction requirements of meta
The definitions in this section shall apply within this article and throughout the Code.
Metal Auxiliary Gutter.
#### 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 housing and protecting electrical wires, cable, and busbars.
The enclosure is designed for conductors to be laid or set in place after the enclosures have been installed as a complete system.
Nonmetallic Auxiliary Gutter.
#### Nonmetallic Auxiliary Gutter.
A flame-retardant, nonmetallic 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 housing and protecting electrical wires, cable, and busbars. The enclosure is designed for conductors to be laid or set in place after the enclosures have been installed as a complete system.
@@ -3017,7 +3013,7 @@ This article covers service-entrance, feeder, and branch-circuit busways and ass
The definition in this section shall apply within this article and throughout the Code.
Busway.
#### 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.
@@ -3297,7 +3293,7 @@ This article covers the use and installation requirements of cablebus and associ
The definition in this section shall apply within this article and throughout the Code.
Cablebus.
#### 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 designed to carry fault current and to withstand the magnetic forces of such current.
@@ -3429,11 +3425,11 @@ This article covers cellular concrete floor raceways, the hollow spaces in floor
The definitions in this section shall apply only within this article.
Cell.
#### Cell.
A single, enclosed tubular space in a floor made of precast cellular concrete slabs, the direction of the cell being parallel to the direction of the floor member.
Header.
#### Header.
Transverse metal raceways for electrical conductors, providing access to predetermined cells of a precast cellular concrete floor, thereby permitting the installation of electrical conductors from a distribution center to the floor cells.
@@ -3508,15 +3504,15 @@ This article covers the use and installation requirements for cellular metal flo
The definitions in this section shall apply within this article and throughout the Code.
Cellular Metal Floor Raceway.
#### 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.
#### Cell.
A single enclosed tubular space in a cellular metal floor member, the axis of the cell being parallel to the axis of the metal floor member.
Header.
#### Header.
A transverse raceway for electrical conductors, providing access to predetermined cells of a cellular metal floor, thereby permitting the installation of electrical conductors from a distribution center to the cells.
@@ -3599,7 +3595,7 @@ This article covers the use, installation, and construction specifications for m
The definition in this section shall apply within this article and throughout the Code.
Metal Wireways.
#### Metal Wireways.
Sheet metal troughs with hinged or removable 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 complete system.
@@ -3748,7 +3744,7 @@ This article covers the use, installation, and construction specifications for n
The definition in this section shall apply within this article and throughout the Code.
Nonmetallic Wireways.
#### 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.
@@ -3921,11 +3917,11 @@ This article covers the use, installation, and construction specifications for n
The definitions in this section shall apply within this article and throughout the Code.
Concealable Nonmetallic Extension.
#### 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 nonmetallic covering. The classification includes surface extensions intended for mounting directly on the surface of walls or ceilings and concealed with paint, texture, joint compound, plaster, wallpaper, tile, wall paneling, or other similar materials.
Nonmetallic Extension.
#### Nonmetallic Extension.
An assembly of two insulated conductors within a nonmetallic jacket or an extruded thermoplastic covering. The classification includes surface extensions intended for mounting directly on the surface of walls or ceilings.
@@ -4094,7 +4090,7 @@ This article covers the use, installation, and construction specifications of st
The definition in this section shall apply within this article and throughout the Code.
Strut-Type Channel Raceway.
#### Strut-Type Channel Raceway.
A metal raceway that is intended to be mounted to the surface of or suspended from a structure, with associated accessories for the installation of electrical conductors and cables.
@@ -4232,7 +4228,7 @@ This article covers the use, installation, and construction specifications for s
The definition in this section shall apply within this article and throughout the Code.
Surface Metal Raceway.
#### Surface Metal Raceway.
A metal raceway that is intended to be mounted to the surface of a structure, with associated couplings, connectors, boxes, and fittings for the installation of electrical conductors.
@@ -4329,7 +4325,7 @@ This article covers the use, installation, and construction specifications for s
The definition in this section shall apply within this article and throughout the Code.
Surface Nonmetallic Raceway.
#### Surface Nonmetallic Raceway.
A nonmetallic raceway that is intended to be mounted to the surface of a structure, with associated couplings, connectors, boxes, and fittings for the installation of electrical conductors.
@@ -4415,7 +4411,7 @@ This article covers the use and installation requirements for underfloor raceway
The definition in this section shall apply within this article and throughout the Code.
Underfloor Raceway.
#### Underfloor Raceway.
A raceway and associated components designed and intended for installation beneath or flush with the surface of a floor for the installation of cables and electrical conductors.
@@ -4517,7 +4513,7 @@ This article covers cable tray systems, including ladder, ventilated trough, ven
The definition in this section shall apply within this article and throughout the Code.
Cable Tray System.
#### Cable Tray System.
A unit or assembly of units or sections and associated fittings forming a structural system used to securely fasten or support cables and raceways.
@@ -5244,55 +5240,55 @@ This article covers the installation of low-voltage suspended ceiling power dist
The definitions in this section shall apply only within this article.
Busbar.
#### Busbar.
A noninsulated conductor electrically connected to the source of supply and physically supported on an insulator providing a power rail for connection to utilization equipment, such as sensors, actuators, A/V devices, low-voltage luminaire assemblies, and similar electrical equipment.
Busbar Support.
#### Busbar Support.
An insulator that runs the length of a section of suspended ceiling bus rail that serves to support and isolate the busbars from the suspended grid rail.
Connector.
#### Connector.
A term used to refer to an electromechanical fitting.
Connector, Load.
#### Connector, Load.
An electromechanical connector used for power from the busbar to utilization equipment.
Connector, Pendant.
#### Connector, Pendant.
An electromechanical or mechanical connector used to suspend low-voltage luminaire or utilization equipment below the grid rail and to supply power to connect from the busbar to utilization equipment.
Connector, Power Feed.
#### Connector, Power Feed.
An electromechanical connector used to connect the power supply to a power distribution cable, to connect directly to the busbar, or to connect from a power distribution cable to the busbar.
Connector, Rail to Rail.
#### Connector, Rail to Rail.
An electromechanical connector used to interconnect busbars from one ceiling grid rail to another grid rail.
Grid Bus Rail.
#### Grid Bus Rail.
A combination of the busbar, the busbar support, and the structural suspended ceiling grid system.
Low-Voltage Suspended Ceiling Power Distribution System.
#### Low-Voltage Suspended Ceiling Power Distribution System.
A system that serves as a support for a finished ceiling surface and consists of a busbar and busbar support system to distribute power to utilization equipment supplied by a Class 2 power supply.
Power Supply.
#### Power Supply.
A Class 2 power supply connected between the branch-circuit power distribution system and the busbar low-voltage suspended ceiling power distribution system.
Rail.
#### Rail.
The structural support for the suspended ceiling system typically forming the ceiling grid supporting the ceiling tile and listed utilization equipment, such as sensors, actuators, A/V devices, and low-voltage luminaires and similar electrical equipment.
Reverse Polarity Protection (Backfeed Protection).
#### Reverse Polarity Protection (Backfeed Protection).
A system that prevents two interconnected power supplies, connected positive to negative, from passing current from one power source into a second power source.
Suspended Ceiling Grid.
#### Suspended Ceiling Grid.
A system that serves as a support for a finished ceiling surface and other utilization equipment.
@@ -5480,7 +5476,7 @@ This article covers the use, installation, and construction specifications of co
The definition in this section shall apply within this article and throughout the Code.
Concealed Knob-and-Tube Wiring.
#### Concealed Knob-and-Tube Wiring.
A wiring method using knobs, tubes, and flexible nonmetallic tubing for the protection and support of single insulated conductors.
@@ -5588,7 +5584,7 @@ This article covers the use, installation, and construction specifications for m
### 396.2 Definitions.
Insulated Conductor.
#### Insulated Conductor.
This definition shall apply only within this article.
@@ -5599,11 +5595,9 @@ For the purposes of this article, an insulated conductor includes the following:
* (2) Overhead service conductors encased in a polymeric material that has been evaluated for the applied nominal voltage.
> [!info] Informational Note:
> Evidence of evaluation for the applied nominal voltage can be given by certification that the conductors have met the requirements of ICEA S-76-474-2011, Standard for Neutral Supported Power Cable Assemblies with Weather-Resistant Extruded
> Evidence of evaluation for the applied nominal voltage can be given by certification that the conductors have met the requirements of ICEA S-76-474-2011, Standard for Neutral Supported Power Cable Assemblies with Weather-Resistant Extruded Insulation Rated 600 Volts.
Insulation Rated 600 Volts.
Messenger-Supported Wiring.
#### Messenger-Supported Wiring.
This definition shall apply within this article and throughout the Code.
@@ -5702,7 +5696,7 @@ This article covers the use, installation, and construction specifications of op
The definition in this section shall apply within this article and throughout the Code.
Open Wiring on Insulators.
#### Open Wiring on Insulators.
An exposed wiring method using cleats, knobs, tubes, and flexible tubing for the protection and support of single insulated conductors run in or on buildings.
@@ -5827,7 +5821,7 @@ This article covers the use and installation for outdoor overhead conductors ove
The definitions in this section shall apply only within this article.
Outdoor Overhead Conductors.
#### Outdoor Overhead Conductors.
Single conductors, insulated, covered, or bare, installed outdoors on support structures in free air.