Structured Cabling Systems
Remake batch 23: rewritten from scratch under the authoring cheatsheet with datasheet constraints; scope boundaries restated against the remade neighbors
Showing changes from Rev 2
to Rev 3
in Structured Cabling Systems.
---
title: Structured Cabling Systems
category: Electrical
−toc_depth: 3
description: >
− When to use: permanent structured telecommunications cabling for commercial, institutional,
− and light-industrial buildings - horizontal cabling from the telecommunications room to the
− work-area outlet, backbone between TRs and the main/intermediate distribution areas, entrance
− facilities, telecommunications rooms, and the supporting pathways. Covers balanced twisted-pair
− copper (Cat 5e through Cat 8), multimode fiber (OM3/OM4/OM5), singlemode fiber (OS2), and the
− connecting hardware (patch panels, outlets, faceplates, cross-connects) for a vendor-neutral,
− standards-compliant voice/data/low-voltage cabling plant.
− Not intended for: telecommunications grounding and bonding (see sync/telecommunications-bonding);
− conduit, wireway, and raceway selection and sizing (see sync/raceways-and-conduit); cable tray
− systems (see sync/cable-tray); power wiring conductors (see sync/conductors-and-cables); IP
− video surveillance camera cabling and analog CCTV (see sync/video-surveillance-systems);
− purpose-built data-center cabling under TIA-942-B scope; outside-plant inter-building fiber
− beyond the entrance-facility handoff; active network equipment (switches, routers, wireless
− access points); and fire alarm, security alarm, and Class 2/3 control wiring.
+ When to use: The passive telecommunications cabling plant of a commercial, institutional, industrial, healthcare, or multifamily building: the horizontal cabling from each telecommunications room to the work-area outlets, the backbone cabling between telecommunications spaces, the cabling of the entrance facility up to the service provider demarcation, and the connecting hardware that joins them, including patch panels, modular jacks and faceplates, consolidation points, cross-connects, fiber enclosures, patch cords, and equipment cords. Covers balanced twisted-pair cabling of Category 5e through Category 8, multimode and singlemode optical fiber, cable listing by the space it occupies, Power over Ethernet thermal provisions, field certification testing and the test report, administration and labeling under ANSI/TIA-606, installer and fiber termination qualifications, the manufacturer system warranty, and spares, on new construction, tenant improvement, and renovation.
+
+ Not intended for: Telecommunications rooms, equipment rooms, entrance rooms, riser sleeves, tray and ladder rack, J-hooks, surface raceway, and the overhead supports inside the building ([[sync/telecommunications-rooms-and-pathways]]); the telecommunications bonding backbone, its busbars, cable shield bonding, and the primary protectors on entrance cable ([[sync/telecommunications-bonding]]); cable tray and conduit in general building spaces and their supports ([[sync/cable-tray]], [[sync/raceways-and-conduit]]); the firestop systems at cable penetrations of rated assemblies ([[sync/firestopping]]); power conductors and building wire ([[sync/conductors-and-cables]]); instrument, control, fieldbus, and serial cable ([[sync/instrumentation-and-control-cable]]); the media selection, active devices, and network tests of a process control network ([[sync/process-control-networks]]); the coaxial distribution and the strand assignments of a distributed antenna system ([[sync/distributed-antenna-systems]]); the responder radio coverage system ([[sync/public-safety-radio-systems]]); the cameras, recorders, and dedicated camera cabling of a video surveillance system ([[sync/video-surveillance-systems]]); the patient stations, dome lights, and master stations of a nurse call system ([[sync/nurse-call-systems]]); the detection devices and their Class 2 device wiring of an intrusion detection system ([[sync/intrusion-detection-systems]]); access control reader and controller cabling ([[sync/access-control-systems]]); fire alarm circuits ([[sync/fire-alarm-systems]]); the loudspeakers, amplifiers, and audio transport of a paging system ([[sync/public-address-and-paging]]); floor boxes and poke-through housings and their insert positions ([[sync/electrical-floor-boxes-and-poke-throughs]]); power receptacles, switches, and their wall plates ([[sync/wiring-devices]]); active network equipment, including switches, routers, and wireless access points, and the configuration of virtual networks, multicast, and quality of service on them; outside-plant cabling between buildings beyond the entrance facility; and the cabling topologies of a data center under ANSI/TIA-942.
---
# Scope {toc}
−## This standard covers the design, furnishing, installation, testing, and administration of a permanent structured telecommunications cabling system for a commercial, institutional, or light-industrial building.
+## This standard governs the passive cabling plant of a building as a product and as installed work: the cable, the connecting hardware at both ends of it, the cords that put it into service, the labels and records that make it administrable, the field certification that proves it meets its category, and the warranty that stands behind it. {note}
−### The structured cabling system comprises horizontal cabling from each telecommunications room (TR) to the work-area outlets, backbone cabling between TRs and the main distribution area (MDA) or intermediate distribution areas (IDA), entrance facilities, and the connecting hardware (patch panels, outlets, faceplates, and cross-connects) that join them. {note}
+## A structured cabling plant is application-independent. It is specified to a transmission category and tested to that category, not to the equipment connected to it on the day it is accepted, because the cabling outlives several generations of switches, telephones, cameras, and access points, and the plant that was built to a category can carry whatever a later generation of equipment asks of it within that category. {note}
−### A structured cabling plant is deliberately vendor-neutral and application-independent: it is a passive physical layer engineered to a published performance grade so that any conforming active equipment can be connected to it over its service life. The cabling outlives several generations of switches and phones, so it is specified to a transmission category and tested to that category, not to the application running over it today. {note}
+## The plant is organized as ANSI/TIA-568 describes it: horizontal cabling from a telecommunications room to the outlets on the floor it serves, backbone cabling between the telecommunications rooms, the equipment room, and the entrance facility, and connecting hardware at every transition, so that any outlet can be patched to any equipment port without a new cable being pulled. {note}
−### Copper balanced twisted-pair cabling (Cat 5e through Cat 8), multimode optical fiber (OM3, OM4, OM5), and singlemode optical fiber (OS2) are all within scope, as is the pathway support furnished specifically for the telecommunications cabling - J-hooks, surface raceway, and dedicated sleeves.
+## The following are governed elsewhere and are outside this standard. {note}
−### Telecommunications grounding and bonding - the telecommunications bonding backbone, the telecommunications main grounding busbar (TMGB), and the telecommunications grounding busbars (TGB) - is coordinated here but specified in [[sync/telecommunications-bonding]]. {note}
+- Telecommunications rooms, equipment rooms, entrance rooms, their construction, power, and cooling, and the riser sleeves, cable tray, ladder rack, J-hooks, surface raceway, and overhead support that carry the cabling inside the building, under [[sync/telecommunications-rooms-and-pathways]]
+- The telecommunications bonding backbone, the primary and secondary bonding busbars, the bonding of cable shields, racks, and metallic pathway, and the primary protectors on entrance cable, under [[sync/telecommunications-bonding]]
+- Cable tray in general building spaces, its fill, and its supports, under [[sync/cable-tray]]; conduit, surface raceway, outlet boxes, conduit fill, and conduit supports, under [[sync/raceways-and-conduit]]
+- The firestop system at every cable penetration of a rated wall or floor, under [[sync/firestopping]]
+- Power conductors and building wire, under [[sync/conductors-and-cables]]
+- Instrument, control, thermocouple, fieldbus, and serial cable of a plant control system, under [[sync/instrumentation-and-control-cable]]
+- The selection of media, the active devices, the segmentation, and the network tests of a process control network, under [[sync/process-control-networks]]
+- The coaxial distribution, the remote units, and the antennas of a distributed antenna system, under [[sync/distributed-antenna-systems]], and the responder radio coverage system, under [[sync/public-safety-radio-systems]]
+- The cameras, recorders, and the camera cabling dedicated to a video surveillance system, under [[sync/video-surveillance-systems]]
+- The patient stations, dome lights, master stations, and device wiring of a nurse call system, under [[sync/nurse-call-systems]]
+- The detection devices, control panels, and Class 2 device wiring of an intrusion detection system, under [[sync/intrusion-detection-systems]]
+- Reader and controller cabling of an access control system, under [[sync/access-control-systems]]
+- Fire alarm circuits and their wiring, under [[sync/fire-alarm-systems]]
+- The loudspeakers, amplifiers, stations, and audio transport of a paging system, under [[sync/public-address-and-paging]]
+- Floor box and poke-through housings, their service fittings, and the number of insert positions they provide, under [[sync/electrical-floor-boxes-and-poke-throughs]]
+- Power receptacles, switches, dimmers, and their wall plates, under [[sync/wiring-devices]]
−### Conduit, wireway, and raceway selection and sizing are specified in [[sync/raceways-and-conduit]]; cable tray supporting telecommunications cabling is specified in [[sync/cable-tray]]; power-wiring conductors are specified in [[sync/conductors-and-cables]]. This standard cites their fill, separation, and bend-radius requirements but does not duplicate them. {note}
+## Active network equipment, including switches, routers, firewalls, and wireless access points, and the configuration of virtual networks, multicast, quality of service, and addressing on that equipment, are outside this standard; the cabling plant is specified so that any such configuration can be applied to equipment connected to it. {note}
−### IP video surveillance camera cabling, analog CCTV, and coax-based surveillance distribution are specified in [[sync/video-surveillance-systems]]; only standard horizontal and backbone runs serving those systems are governed here. {note}
+## Outside-plant cabling between buildings beyond the entrance facility, the cabling topologies and fabrics of a data center under ANSI/TIA-942, and wireless local area network design are outside this standard and are not owned by another SynC standard. {note}
−### Purpose-built data centers and server rooms under the ANSI/TIA-942-B scope, outside-plant buried or aerial fiber between separate buildings beyond the entrance-facility handoff, active network equipment (switches, routers, wireless access points), and fire alarm, security alarm, and Class 2/3 control wiring are excluded from this standard. {note}
+## Where another system is served from the structured cabling plant, the horizontal cabling, the backbone cabling, and the connecting hardware that serve it comply with this standard, and the device at the end of the cable and its own wiring comply with that system's standard: the network cabling to a networked charging unit under [[sync/electric-vehicle-charging]], the cabling to a Power over Ethernet luminaire or controller under [[sync/lighting-controls]], the cabling to a camera served from the shared plant under [[sync/video-surveillance-systems]], the cabling to a networked nurse call controller under [[sync/nurse-call-systems]], the backbone fiber and the horizontal cabling serving a distributed antenna system under [[sync/distributed-antenna-systems]], and the cabling of an intrusion detection device that is part of the structured plant rather than of the system's own Class 2 wiring under [[sync/intrusion-detection-systems]]. {note}
+## Where a process control network under [[sync/process-control-networks]] selects balanced twisted-pair or optical fiber media, the cable, the connecting hardware, and the certification test of that media comply with this standard, and that standard keeps the selection of the media, the segment lengths, and the tests of the network itself. {note}
+
+## Telecommunications outlets, modular jacks, and their faceplates are furnished under this standard, and the floor box or poke-through housing an outlet sits in is furnished under [[sync/electrical-floor-boxes-and-poke-throughs]] with the number of insert positions that the connector schedule of this standard requires at that location. {note}
+
+## The field certification of the cabling plant is performed under this standard; the electrical acceptance test program under [[sync/electrical-acceptance-testing]] does not include it, and where the project is commissioned, the certification reports are delivered to the commissioning authority as inputs under [[sync/commissioning]]. {note}
+
+## The installation shall comply with the edition of NFPA 70 adopted with [[parameter: adopted-building-code]], including Articles 725, 770, 800, and 805, and with the amendments of the Authority Having Jurisdiction.
+
+## The location of every work-area outlet, the box or housing that serves it, and the identifier assigned to it shall be as indicated on [[drawing: the telecommunications plans]].
+
+## The pair count of each copper backbone cable, the strand count of each optical fiber backbone cable, and the spaces each backbone cable connects shall be as indicated on [[drawing: the telecommunications riser diagram]].
+
# Referenced Standards {toc}
## Equipment, materials, and installation shall comply with the latest adopted edition of each of the following unless a specific edition is cited.
−## Where referenced standards conflict, the more stringent requirement shall govern unless the Engineer of Record directs otherwise in writing.
+## Where the contract documents, the Authority Having Jurisdiction, or two referenced standards impose conflicting requirements, the more stringent requirement shall govern unless the Engineer of Record directs otherwise in writing.
| Standard | Title |
|----------|-------|
−| ANSI/TIA-568.0-E | Generic Telecommunications Cabling for Customer Premises |
−| ANSI/TIA-568.1-E | Commercial Building Telecommunications Infrastructure Standard |
−| ANSI/TIA-568.2-E | Balanced Twisted-Pair Telecommunications Cabling and Components Standard |
−| ANSI/TIA-568.3-E | Optical Fiber Cabling and Components Standard |
−| ANSI/TIA-568.4-D | Broadband Coaxial Cabling and Components Standard |
−| ANSI/TIA-569-E | Telecommunications Pathways and Spaces |
−| ANSI/TIA-606-D | Administration Standard for Telecommunications Infrastructure |
−| ANSI/TIA-607-C | Generic Telecommunications Bonding and Grounding (Earthing) for Customer Premises |
−| ANSI/TIA-942-B | Telecommunications Infrastructure Standard for Data Centers |
+| ANSI/TIA-568.0 | Generic Telecommunications Cabling for Customer Premises |
+| ANSI/TIA-568.1 | Commercial Building Telecommunications Infrastructure Standard |
+| ANSI/TIA-568.2 | Balanced Twisted-Pair Telecommunications Cabling and Components Standard |
+| ANSI/TIA-568.3 | Optical Fiber Cabling and Components Standard |
+| ANSI/TIA-569 | Telecommunications Pathways and Spaces |
+| ANSI/TIA-606 | Administration Standard for Telecommunications Infrastructure |
+| ANSI/TIA-607 | Generic Telecommunications Bonding and Grounding (Earthing) for Customer Premises |
+| ANSI/TIA-1152-A | Requirements for Field Test Instruments and Measurements for Balanced Twisted-Pair Cabling |
+| ANSI/TIA-526-7 | Measurement of Optical Power Loss of Installed Single-Mode Fiber Cable Plant |
+| ANSI/TIA-526-14 | Optical Power Loss Measurements of Installed Multimode Fiber Cable Plant |
+| ANSI/TIA-598 | Optical Fiber Cable Color Coding |
+| ANSI/TIA-TSB-184-A | Guidelines for Supporting Power Delivery Over Balanced Twisted-Pair Cabling |
| ANSI/NECA/BICSI-568 | Standard for Installing Commercial Building Telecommunications Cabling |
−| NFPA 70 (NEC) Article 800 | Communications Circuits |
−| NFPA 70 (NEC) Article 770 | Optical Fiber Cables and Raceways |
−| NFPA 70 (NEC) Article 725 | Class 1, Class 2, and Class 3 Remote-Control, Signaling, and Power-Limited Circuits |
−| BICSI TDMM | Telecommunications Distribution Methods Manual, 15th Edition |
−| ASTM E814 / UL 1479 | Fire Tests of Penetration Firestop Systems |
−| IBC Section 714 | Penetrations (firestopping of fire-resistance-rated assemblies) |
+| NFPA 70 | National Electrical Code (Articles 725, 770, 800, and 805) |
+| UL 444 | Communications Cables |
+| UL 1651 | Optical Fiber Cable |
+| UL 1863 | Communications-Circuit Accessories |
+| UL 969 | Marking and Labeling Systems |
+| IEEE 802.3 | Standard for Ethernet (Clause 55, 10GBASE-T; Clause 145, Power over Ethernet) |
+## ANSI/TIA-607 is listed because the shield bonding and the bonding busbars this standard refers to are specified to it; the bonding work itself is under [[sync/telecommunications-bonding]], and ANSI/TIA-569 is listed for the same reason with respect to the pathways under [[sync/telecommunications-rooms-and-pathways]]. {note}
+
# Submittals {toc}
## Action Submittals {toc}
−### The Contractor shall submit the following action submittals for review before ordering material or beginning installation:
+### The Contractor shall submit the following for review and return before any cable or connecting hardware is procured:
−- Product data for each cable type, patch panel, outlet, faceplate, connector, and pathway support component, including transmission-performance data sheets and NEC/UL cable listing (CMP/CMR/CM, OFNP/OFNR/OFN).
−- Shop drawings showing telecommunications room layouts, rack and ladder-rack elevations, backbone pathway routing and sleeve locations, work-area outlet locations, and the cable-administration (labeling) scheme.
−- A cabling system design narrative identifying the selected copper category, fiber grades, connector types, polarity method, and the channel/permanent-link length budget.
−- Manufacturer warranty letter and the list of all-same-brand channel components that the warranty requires.
−- Field-test plan identifying test instruments, software/firmware versions, the test-limit standard to be applied, and the calibration certificates.
−- A sample completed work-area outlet and patch-panel termination for workmanship approval before production termination begins.
+- Product data for each cable type, identifying the manufacturer, the category or fiber type, the construction and shielding, the conductor size, the UL listing type, the outside diameter, the bend radius, the pulling tension, and the published transmission performance
+- Product data for each modular jack, faceplate, patch panel, fiber enclosure, adapter panel, consolidation point enclosure, and cross-connect block, identifying the category, the shielding, the listing, and the mounting
+- Product data for patch cords and equipment cords, identifying the category, the shielding, the conductor stranding, the lengths, and the listing
+- Shop drawings consisting of the riser diagram with every backbone cable, its pair or strand count, and the spaces it connects, the floor plans with every outlet and its identifier, and the layout of patch panels, fiber enclosures, and cable management on each rack and backboard
+- The administration plan, giving the identifier format for every cable, outlet, patch panel, fiber enclosure, and space, the label material and method, and the color scheme for terminations
+- The warranty registration documentation of the connectivity manufacturer, where a system warranty is selected, identifying the products that constitute a warranted channel
+- A sample of each outlet faceplate with its jacks and label, and a sample patch panel termination, for review of workmanship before production termination begins
```datasheet
−label: Action submittals required
+label: Action Submittals
type: checkbox
options:
− - Product data (cable, connectivity, pathway supports)
− - Shop drawings (TR layouts, rack elevations, backbone routing)
− - Cabling system design narrative
− - Manufacturer warranty letter and channel component list
− - Field-test plan and instrument calibration certificates
− - Sample termination for workmanship approval
+ - "Cable product data"
+ - "Connecting hardware product data"
+ - "Patch cord and equipment cord product data"
+ - "Riser diagram, floor plans, and rack layouts"
+ - "Administration plan"
+ - "Warranty registration documentation"
+ - "Outlet and patch panel workmanship samples"
default:
− - Product data (cable, connectivity, pathway supports)
− - Shop drawings (TR layouts, rack elevations, backbone routing)
− - Cabling system design narrative
− - Manufacturer warranty letter and channel component list
− - Field-test plan and instrument calibration certificates
+ - "Cable product data"
+ - "Connecting hardware product data"
+ - "Patch cord and equipment cord product data"
+ - "Riser diagram, floor plans, and rack layouts"
+ - "Administration plan"
+ - "Warranty registration documentation"
+constraint: all_of
```
−## Closeout Submittals {toc}
+### No cable or connecting hardware shall be procured until the product data for it has been reviewed and returned, and no production termination shall begin until the workmanship samples have been reviewed and returned.
−### The Contractor shall submit the following closeout submittals before final acceptance:
+### The administration plan is reviewed with the floor plans because the identifier on every label is derived from the room, the rack, the panel, and the port that the plans define; a labeling scheme invented after the cable is pulled is the one that never matches the record drawings. {note}
−- Complete field-test result files in the test instrument's native format plus a summary report, for every copper permanent link and every fiber segment.
−- As-built record documentation per ANSI/TIA-606-D, including the cable-management database, labeled floor plans, and rack elevations reflecting actual installed conditions.
−- The executed manufacturer system warranty certificate.
−- Firestop documentation identifying each rated penetration, the listed firestop system used, and its F-rating.
+## Informational Submittals {toc}
+### The Contractor shall submit the following with or before the action submittals:
+
+- The qualifications of the installing firm and of the supervising technician, and the certificate of each technician who terminates or splices optical fiber
+- The manufacturer's certification of the installing firm for the system warranted, where a system warranty is selected
+- The field test plan, identifying the test instruments by model and serial number, the accuracy level, the adapters, the firmware version, the test limits to be applied, and the calibration certificate of each instrument
+- The optical loss budget of every optical fiber link, computed from the cable attenuation, the connector count, and the splice count
+- The bundle-size calculation or the manufacturer's compliance statement for every pathway carrying Power over Ethernet of Type 3 or Type 4
+
```datasheet
−label: Closeout submittals required
+label: Informational Submittals
type: checkbox
options:
− - Field-test result files (copper and fiber) plus summary report
− - As-built TIA-606-D administration records
− - Executed manufacturer warranty certificate
− - Firestop penetration documentation
+ - "Installer and technician qualifications"
+ - "Manufacturer certification of the installing firm"
+ - "Field test plan and instrument calibration certificates"
+ - "Optical loss budgets"
+ - "Power over Ethernet bundle-size calculations"
default:
− - Field-test result files (copper and fiber) plus summary report
− - As-built TIA-606-D administration records
− - Executed manufacturer warranty certificate
− - Firestop penetration documentation
+ - "Installer and technician qualifications"
+ - "Manufacturer certification of the installing firm"
+ - "Field test plan and instrument calibration certificates"
+ - "Optical loss budgets"
+constraint: all_of
```
−# Quality Assurance {toc}
+### The field test plan is submitted before testing begins so that the test limits, the link configuration, and the instrument level are agreed before a result exists to argue about; a test run to the wrong limit or with an uncalibrated instrument is a test that is run twice. {note}
−## The cabling installation shall be performed by technicians holding current manufacturer certification for the warrantied system and supervised by a BICSI-credentialed designer or installer. {note}
+## Closeout Submittals {toc}
−## The Contractor shall be a manufacturer-authorized installer in good standing such that the specified system warranty can be registered and issued for this project.
+### The Contractor shall submit the following before the cabling plant is accepted:
−## All connecting hardware, cable, patch cords, and outlets that form a warrantied channel shall be of a single manufacturer's compatible product line.
+- The certification test results for every balanced twisted-pair link and every optical fiber strand, in the native file format of the test instrument and as a summary report listing every link, its result, and every link that was corrected and retested
+- The record documents under ANSI/TIA-606 at the administration class selected: the as-built riser diagram, the floor plans with every outlet identifier as installed, the patch panel and fiber enclosure layouts as installed, and the cable record in an electronic format the Owner can edit
+- The executed system warranty certificate from the connectivity manufacturer, where a system warranty is selected, and the Contractor's installation warranty
+- A signed receipt from the Owner for the spare parts delivered
−## A standards-compliant warranty is only as good as the channel it certifies: most extended application-assurance warranties are voided the moment a contractor substitutes a cheaper jack or patch cord from another brand, because the manufacturer cannot guarantee a channel built from components it did not test together. Specify all-same-brand connectivity explicitly so it survives value engineering. {note}
+```datasheet
+label: Closeout Submittals
+type: checkbox
+options:
+ - "Certification test results, native files and summary report"
+ - "Record documents and cable record under ANSI/TIA-606"
+ - "System warranty certificate and installation warranty"
+ - "Spare parts receipt"
+default:
+ - "Certification test results, native files and summary report"
+ - "Record documents and cable record under ANSI/TIA-606"
+ - "System warranty certificate and installation warranty"
+ - "Spare parts receipt"
+constraint: all_of
+```
−## Workmanship shall conform to ANSI/NECA/BICSI-568 for pulling tension, bend radius, slack, dressing, and support.
+### Record documents shall be assembled and delivered in the form required under [[sync/closeout-procedures]], and the items listed above are the cabling content of that package.
−## Manufacturer Warranty Tier {toc}
+# Quality Assurance {toc}
+## Installer Qualifications {toc}
+
+### The installing firm and its supervising technician shall hold the qualifications indicated in the datasheet.
+
```datasheet
−label: Manufacturer system warranty tier
−type: radio
+label: Installer Qualifications Required
+type: checkbox
options:
− - 15-year application-assurance warranty
− - 25-year extended system warranty (all-same-brand channel required)
−default: 25-year extended system warranty (all-same-brand channel required)
+ - "Supervising technician holds a current BICSI Technician credential or an equivalent industry credential"
+ - "Installing firm holds the low-voltage or telecommunications contractor license the jurisdiction requires"
+ - "Installing firm has completed three structured cabling installations of comparable size within the last five years"
+default:
+ - "Supervising technician holds a current BICSI Technician credential or an equivalent industry credential"
+ - "Installing firm holds the low-voltage or telecommunications contractor license the jurisdiction requires"
+constraint: all_of
```
−# Environmental and Service Conditions {toc}
+### Each technician who terminates or splices optical fiber shall have completed the connector manufacturer's or the splicer manufacturer's training for the termination method furnished, and the certificate of that training shall be included in the informational submittals.
−## Cable jacket fire-listing shall match the pathway fire zone: plenum-rated cable (CMP for copper, OFNP for fiber) in environmental air-handling spaces, riser-rated cable (CMR for copper, OFNR for fiber) in vertical riser pathways, and general-purpose cable (CM/OFN) only where neither condition applies.
+### Where the parties disagree whether a prior installation is of comparable size, the Engineer of Record shall make the initial determination.
−## Installing CM-rated cable in a plenum air-handling space violates NEC Article 800/770 and fails AHJ inspection; conversely, specifying CMP everywhere when most pathways are not plenum needlessly inflates cost. Confirm the actual air-handling design with the mechanical drawings before selecting the jacket rating. {note}
+### A balanced twisted-pair termination that fails is usually a pair untwisted too far or a jacket stripped too far back, and a fiber termination that fails is usually a scratched or contaminated end face; both are the work of a hand that has not been trained on the product in use, and the retesting and re-termination they cause cost more than the training they replace. {note}
−## Cable shall not be installed where the ambient or self-heated conductor temperature exceeds the cable's jacket temperature rating; for Power-over-Ethernet loads, bundle self-heating shall be accounted for as required by the PoE provisions below.
+## Manufacturer System Warranty {toc}
−## Cable Fire Listing {toc}
+### The cabling plant shall be furnished with the manufacturer system warranty indicated in the datasheet.
```datasheet
−label: Copper cable fire listing
+label: Manufacturer System Warranty
type: radio
options:
− - CMP (plenum)
− - CMR (riser)
− - CM (general purpose)
−default: CMR (riser)
+ - "Registered system warranty issued by the connectivity manufacturer through a certified installer"
+ - "No system warranty, component warranties only"
+default: "Registered system warranty issued by the connectivity manufacturer through a certified installer"
```
+### A registered system warranty covers the installed channels against defects and warrants that they support the applications the category is rated for, and it is issued only when the cable and the connecting hardware are the manufacturer's own or its named partner's and the installer is one the manufacturer has certified, so it fixes the source of every component and narrows the bidders to certified firms; it is the arrangement on most specified commercial and institutional projects, which is why it is the default. Component warranties alone open the cable and the hardware to any listed manufacturer and any qualified installer, and leave the Owner with a warranty on each product rather than on the channel, which a small project or a renovation that extends an unwarranted plant is served by. {note}
+
+### Where a system warranty is selected, the cable, the modular jacks, the patch panels, the fiber connectivity, and the cords of every warranted channel shall be products of the connectivity manufacturer or of the partner that manufacturer names in its warranty program, and the installing firm shall hold that manufacturer's certification at the time of installation.
+
+### Where a system warranty is selected, the Contractor shall register the installation with the manufacturer and shall deliver the warranty certificate within 60 days after the certification test results are accepted.
+
+## Listing and Compliance {toc}
+
+### Balanced twisted-pair cable shall be listed to UL 444, optical fiber cable to UL 1651, and connecting hardware, outlets, and cords to UL 1863, each by a Nationally Recognized Testing Laboratory, and each shall be marked with its listing type.
+
+### Cable and connecting hardware shall comply with ANSI/TIA-568.2 for balanced twisted-pair components and ANSI/TIA-568.3 for optical fiber components, verified by a third-party component test program or by the manufacturer's published test data for the product furnished.
+
+### Installation workmanship shall comply with ANSI/NECA/BICSI-568.
+
+# Environmental and Service Conditions {toc}
+
+## Cable Listing by Space {toc}
+
+### Cable installed in spaces that the clauses of this article do not otherwise govern shall carry the listing indicated in the datasheet.
+
```datasheet
−label: Optical fiber cable fire listing
−type: radio
+label: Baseline Cable Listing
+type: select
options:
− - OFNP (plenum)
− - OFNR (riser)
− - OFN (general purpose)
−default: OFNR (riser)
+ - "Plenum, Types CMP and OFNP"
+ - "Riser, Types CMR and OFNR"
+ - "General purpose, Types CM and OFN"
```
−## High-EMI Environments {toc}
+### The listing is set by the space the cable passes through under NFPA 70 Articles 770 and 800: a plenum listing is required wherever the cable runs in a space used for environmental air, a riser listing wherever it runs vertically through a shaft or from floor to floor, and the general-purpose listing is permitted everywhere else. A plant specified plenum throughout removes every question of which ceiling is a plenum and costs more per foot, a plant specified riser or general purpose costs less and depends on the mechanical design to say which ceilings return air, and a renovation that cannot verify every ceiling is usually specified plenum for that reason. Whether most ceilings on the project are return-air plenums decides the baseline, so the field carries no default. {note}
−### In high-electromagnetic-interference environments - imaging suites, electrical rooms, certain industrial floors - balanced twisted-pair cabling shall be shielded (F/UTP or U/FTP) and the shield shall be bonded to the telecommunications grounding system per [[sync/telecommunications-bonding]].
+### Cable installed in a space used for environmental air shall be listed as Type CMP or Type OFNP, or as a type NFPA 70 Articles 770 and 800 permit in that space, whatever the datasheet selects.
+### Cable installed in a riser shaft or passing vertically from floor to floor outside a metallic raceway shall be listed as Type CMR or Type OFNR at minimum, whatever the datasheet selects.
+
+### Cable installed in a space used for environmental air and carrying Power over Ethernet of Type 3 or Type 4 shall either carry the limited power marking of UL 444 for the current delivered, or shall be bundled within the count required under Power over Ethernet.
+
+### The ceilings and shafts that are used for environmental air are determined from the mechanical design documents, and the Contractor shall confirm the air-handling use of every pathway with the mechanical drawings before cable is ordered.
+
+## Termination Enclosure Rating {toc}
+
+### Consolidation point enclosures, wall-mounted termination enclosures, fiber enclosures, and surface-mounted outlet housings furnished under this standard shall carry at least the enclosure rating indicated in the datasheet, rated under NEMA 250 or UL 50E.
+
```datasheet
−label: Twisted-pair shielding
−type: radio
+label: Termination Enclosure Rating
+type: select
options:
− - U/UTP (unshielded)
− - F/UTP (foil screened)
− - U/FTP (individually foil-shielded pairs)
−default: U/UTP (unshielded)
+ - "NEMA Type 1"
+ - "NEMA Type 12"
+ - "NEMA Type 3R"
+ - "NEMA Type 4"
+ - "NEMA Type 4X"
+default: "NEMA Type 1"
```
−### Shielded cabling is a cost and a labor burden: it requires shielded jacks, shielded patch panels, continuous shield continuity, and a properly bonded grounding system to perform. Specify it only where the EMI environment genuinely demands it, not as a blanket upgrade. {note}
+### Nearly every termination enclosure sits in a telecommunications room, above a ceiling, or on a wall in a conditioned space, which is why Type 1 is the default; the clauses that follow raise the rating for the locations that need more, whatever the datasheet selects. Type 12 excludes dust and dripping liquid in a shop or a mechanical space; Type 3R excludes rain and sleet on an exterior wall or in an open parking structure; Type 4 excludes hose-directed water in a washdown area; Type 4X adds corrosion resistance for salt air, a natatorium, or a chemical room. {note}
−# Copper Horizontal Cabling {toc}
+### An enclosure installed outdoors, in an open parking structure, or in a loading dock open to the weather shall be rated NEMA Type 3R, Type 4, or Type 4X.
−## Horizontal copper cabling shall be 4-pair balanced twisted-pair cable of the specified category, terminated on an 8-position modular (RJ-45) jack at the work area and on a patch panel or punch-down block in the telecommunications room.
+### An enclosure installed where it is subject to washdown or hose-directed water shall be rated NEMA Type 4 or Type 4X.
−## Category 6A is the default copper grade for new commercial construction: it supports 10GBASE-T over the full 100 m channel and carries IEEE 802.3bt Type 3 and Type 4 PoE with adequate thermal headroom, for roughly 15 to 20 percent more installed cost than Category 6. Specifying Category 6 on new work routinely generates RFIs the moment the owner deploys 10 Gigabit switches or high-wattage PoE devices. {note}
+### An enclosure installed in a coastal location, a natatorium, or another location with salt or chemical vapor in the air shall be rated NEMA Type 4X.
−## Category 6 supports 1GBASE-T over the full 100 m channel and is acceptable only for renovation or retrofit where budget is constrained and 10GBASE-T is not anticipated. Category 5e remains code-compliant but shall not be specified for new work.
+## Temperature and Moisture {toc}
−## Category 8 is a short-reach grade (25GBASE-T / 40GBASE-T to 30 m) intended for top-of-rack equipment connections, not general horizontal distribution; specify it only for those short equipment links. {note}
+### Cable installed outdoors, in an open parking structure, or in a space that follows the outdoor temperature shall be listed for wet locations, sunlight resistant where exposed to sunlight, and rated for installation and operation between [[parameter: site-ambient-temperature-minimum]] and [[parameter: site-ambient-temperature-maximum]].
−## Channel and Permanent-Link Length {toc}
+### Cable shall not be installed at a temperature below the manufacturer's published minimum installation temperature.
−### The horizontal copper permanent link shall not exceed 90 m regardless of how patch-cord length is later allocated.
+### The design ambient temperature of the horizontal pathways, used for the bundle-size limits under Power over Ethernet, shall be as indicated in the datasheet.
```datasheet
−label: Horizontal permanent-link maximum length
+label: Horizontal Pathway Design Ambient Temperature
type: range
−unit: m
−min: 15
−max: 90
−step: 5
−default: 90
+unit: °C
+options:
+ min: 20
+ max: 60
+ setpoints: [20, 30, 40, 45, 50, 60]
+constraint: min
```
−### The total channel - permanent link plus patch cords at both ends - shall not exceed 100 m.
+### ANSI/TIA-568.2 rates a channel at 20 °C and derates its length above that, and a bundle carrying Power over Ethernet heats itself above the space around it, so the ambient of the pathway is the starting point of every bundle-size and length calculation. A conditioned ceiling plenum runs near 30 °C, the space above a top-floor ceiling under a dark roof and an unconditioned mechanical space run to 45 °C or 50 °C in summer, and a pathway on a roof or in an attic runs higher; the value depends on the building and the climate, so the field carries no default. {note}
−### The single most common copper length defect is a contractor running 100 m of horizontal cable and then adding patch cords, producing an out-of-spec channel that fails certification. The 90 m horizontal limit exists precisely to reserve the remaining 10 m for the two patch cords; enforce it as a hard limit, not a target. {note}
+# Horizontal Cabling {toc}
−## Copper Horizontal Cable {toc}
+## Horizontal Cable Category {toc}
−### Horizontal copper cable shall be furnished in the specified category, conductor gauge, and shielding construction, with the fire listing selected under Environmental and Service Conditions.
+### Horizontal balanced twisted-pair cable shall be four-pair cable of the category indicated in the datasheet, and the modular jacks, patch panels, consolidation point hardware, and cords of every horizontal channel shall be of the same category.
```datasheet
−label: Copper horizontal cable category
−type: radio
+label: Horizontal Cable Category
+type: select
options:
− - Cat 5e
− - Cat 6
− - Cat 6A
− - Cat 8
−default: Cat 6A
+ - "Category 5e"
+ - "Category 6"
+ - "Category 6A"
+ - "Category 8"
+default: "Category 6A"
```
+### Category 6A is rated to 500 MHz and carries 10GBASE-T over the full 100 m channel, and its larger conductors and lower resistance unbalance dissipate the heat of Type 3 and Type 4 Power over Ethernet in a full bundle better than Category 6 does, at a cable that is thicker, heavier, and roughly 15 to 25 percent more expensive installed; it is the category on most new specified work, which is why it is the default. Category 6 is rated to 250 MHz, carries 1000BASE-T over 100 m and 10GBASE-T only over about 37 m to 55 m depending on alien crosstalk, and carries Type 3 and Type 4 power with tighter bundle limits, which suits a renovation or a budget-driven building whose switches will stay at 1 Gb/s and whose powered devices draw 30 W or less. Category 5e is rated to 100 MHz, carries 1000BASE-T and Type 2 power, and is selected to extend an existing plant of the same category. Category 8 is rated to 2000 MHz for 25GBASE-T and 40GBASE-T over a channel of 30 m with two connectors, and is selected only for the equipment links inside an equipment room, not for distribution to the floor. {note}
+
+### Where Category 8 is selected, each Category 8 channel shall be limited to 30 m with not more than two connectors, and shall be installed only between equipment within a telecommunications space.
+
+### The conductor size of the horizontal cable shall be as the manufacturer lists for the category furnished, within the 22 AWG to 24 AWG range ANSI/TIA-568.2 permits.
+
+## Horizontal Cable Shielding {toc}
+
+### Horizontal balanced twisted-pair cable shall be of the shielding construction indicated in the datasheet.
+
```datasheet
−label: Conductor size
+label: Horizontal Cable Shielding
type: radio
options:
− - 23 AWG
− - 24 AWG
−default: 23 AWG
+ - "U/UTP, unshielded"
+ - "F/UTP, overall foil screen"
+ - "U/FTP, foil over each pair"
+ - "S/FTP, braid over foil-shielded pairs"
+default: "U/UTP, unshielded"
```
+### Unshielded cable meets every category through Category 6A, is the lightest and least expensive construction, and is terminated without a shield connection, which is why it is the construction on most projects and the default. An overall foil screen suppresses alien crosstalk and external interference with one drain wire to bond at each end; foil over each pair suppresses crosstalk between the pairs as well and is the construction most Category 6A shielded cable uses; a braid over foil-shielded pairs is the construction of Category 7 and Category 8 cable and of an industrial floor with variable frequency drives. Every shielded construction requires shielded jacks, shielded patch panels, shielded cords, and a bonded shield at the telecommunications room to perform, and a shield left floating performs worse than no shield. {note}
+
+### Where a shielded construction is selected, every modular jack, patch panel, consolidation point, and cord in the channel shall be shielded, and the shield shall be continuous from the outlet to the patch panel.
+
+### Where a shielded construction is selected, the cable shield shall be bonded at the patch panel to the rack bonding busbar under [[sync/telecommunications-bonding]].
+
+### Horizontal cabling in the areas indicated on [[drawing: the telecommunications plans]] as subject to electromagnetic interference shall be of a shielded construction, whatever the datasheet selects.
+
+## Horizontal Topology {toc}
+
+### The horizontal cabling shall be arranged in the topology indicated in the datasheet.
+
```datasheet
−label: Pairs per cable
+label: Horizontal Topology
type: radio
options:
− - 4-pair
−default: 4-pair
+ - "Direct, each horizontal cable from the telecommunications room to its outlet"
+ - "Consolidation point in the horizontal cabling"
+ - "Multi-user telecommunications outlet assembly"
+default: "Direct, each horizontal cable from the telecommunications room to its outlet"
```
−## Power over Ethernet {toc}
+### A direct run from the patch panel to the outlet has two connectors in the permanent link, the shortest test limit to meet, and nothing above the ceiling to find later, which is why it is the arrangement on most projects and the default; a consolidation point adds a third connector in an enclosure above the ceiling or in the furniture so that the cables beyond it can be moved when the furniture moves without a pull from the telecommunications room, which an open office with systems furniture is served by; a multi-user telecommunications outlet assembly terminates a group of horizontal cables at one point in the furniture cluster and runs long work-area cords from it to each workstation, which suits an open office whose furniture is reconfigured often and whose cord lengths can be managed. Both alternatives cost a connector in the link budget and a location to record and find. {note}
−### Where the cabling will carry Power over Ethernet, the cable category and bundling shall be selected to keep the self-heated conductor temperature within the cable's rated limit under the specified PoE class.
+### Where a consolidation point is selected, each consolidation point shall be located not less than 15 m from the telecommunications room patch panel, in a location accessible without disturbing the finished ceiling or the furniture, and shall serve not more than twelve work areas.
−### IEEE 802.3bt Type 3 (up to 60 W) and Type 4 (up to 90 W) deliver power over all four pairs, and the DC current heats the bundle from the inside. In a tightly packed conduit, a bundle of 24 cables under sustained Type 4 load can rise on the order of 10 °C above ambient, and that rise stacks on top of the ambient temperature toward the cable's jacket limit. Category 6A, with its larger conductors and lower DC resistance unbalance, dissipates this heat far better than Category 6. {note}
+### Where a multi-user telecommunications outlet assembly is selected, each assembly shall be located in open, accessible furniture pathway rather than above the ceiling, and the length of the horizontal cable and the work-area cord it serves shall be limited together as ANSI/TIA-568.1 requires for the cord length used.
−### Horizontal cable carrying IEEE 802.3bt Type 3 or Type 4 PoE shall be Category 6A minimum.
+## Horizontal Link Length {toc}
+### No horizontal permanent link, measured from the patch panel in the telecommunications room to the outlet, shall exceed 90 m.
+
+### No horizontal channel, including the equipment cord, the patch cords, the permanent link, and the work-area cord, shall exceed 100 m.
+
+### The 90 m limit on the permanent link reserves the remaining 10 m of the channel for the cords at both ends; a cable pulled to 95 m passes a permanent link test at a reduced limit and fails the channel the day a cord is added. Where a pathway cannot reach an outlet within 90 m, the outlet is served from a nearer telecommunications room or over optical fiber, not by a longer cable. {note}
+
+### Where the design ambient temperature of the pathway exceeds 20 °C, the permanent link length shall be reduced as ANSI/TIA-568.2 requires for the temperature, and the reduced length shall be shown on the floor plans for every link it affects.
+
+## Power over Ethernet {toc}
+
+### The horizontal cabling shall be designed, bundled, and terminated to carry Power over Ethernet of the type indicated in the datasheet on every horizontal channel.
+
```datasheet
−label: PoE class supported
−type: radio
+label: Power over Ethernet Design Type
+type: select
options:
− - None (data only)
− - IEEE 802.3af/at (Type 1/2, up to 30 W)
− - IEEE 802.3bt Type 3 (up to 60 W)
− - IEEE 802.3bt Type 4 (up to 90 W)
−default: IEEE 802.3bt Type 3 (up to 60 W)
+ - "No Power over Ethernet"
+ - "IEEE 802.3 Type 1, up to 15 W at the source"
+ - "IEEE 802.3 Type 2, up to 30 W at the source"
+ - "IEEE 802.3 Type 3, up to 60 W at the source"
+ - "IEEE 802.3 Type 4, up to 90 W at the source"
```
−### Where PoE Type 3 or Type 4 is specified, the Contractor shall provide bundle-derating calculations per ANSI/TIA-568.2-E or a manufacturer compliance letter confirming that conductor temperature stays within the cable rating at the design bundle size and ambient temperature.
+### Type 1 and Type 2 power runs over two pairs and heats a bundle little, and a plant of any category carries it in bundles of any size; Type 3 and Type 4 run over all four pairs, and the current heats the cable from inside, so that a bundle of 24 cables under full Type 4 load rises on the order of 10 °C above the pathway ambient, which is added to the ambient against the 60 °C or 75 °C rating of the cable and subtracted from the length the channel is allowed. What the plant will carry follows from the devices the Owner intends to power, including luminaires, access points, cameras, and displays, so the field carries no default; a plant specified for Type 4 carries every lesser type. {note}
+### Where Type 3 or Type 4 is selected, horizontal cables shall be installed in bundles not exceeding the count the cable manufacturer publishes for the type selected at the design ambient temperature of the pathway, as computed under ANSI/TIA-TSB-184-A, unless the cable carries the limited power marking of UL 444 for the current delivered.
+
+### Where Type 3 or Type 4 is selected, the DC resistance unbalance within each pair and between pairs of every horizontal link shall be tested and shall meet the limits of ANSI/TIA-568.2.
+
+### Where Type 3 or Type 4 is selected, modular jacks and patch panels shall be rated by their manufacturer for connection and disconnection under the load of the type selected without contact damage.
+
+# Work-Area Outlets {toc}
+
+## Outlet Configuration {toc}
+
+### The number and the type of modular jacks at each work-area outlet, including each floor box and poke-through, shall be as indicated in the datasheet.
+
```datasheet
−label: Maximum cables per bundle for derating
−type: range
−unit: cables
−min: 12
−max: 48
−step: 12
−default: 24
+label: Work-Area Outlet Configuration
+type: text
+drawing_ref: "the telecommunications outlet schedule"
+default: deferred
```
−### Omitting PoE thermal derating is a real failure mode: cables that test clean cold can exceed their conductor temperature rating once energized in a full conduit, degrading insertion loss and shortening cable life. Treat derating as a required calculation, not an afterthought. {note}
+### The configuration of an outlet differs from one location to the next: a workstation outlet carries two jacks on most projects, one for the computer and one spare that a telephone, a printer, or a second device takes later; a conference room, a nurse station, or a teaching wall carries four to six; a camera, an access point, or a display carries one; and a floor box carries whatever the furniture over it needs. The schedule records each, and the outlet count on the plans and the jack count on the schedule are what the patch panels are sized from. {note}
−# Work-Area Outlets and Connecting Hardware {toc}
+### At each floor box and poke-through, the jack quantity in the outlet schedule shall match the number of modular insert positions provided under [[sync/electrical-floor-boxes-and-poke-throughs]] for that location, and a mismatch shall be reported to the Engineer of Record before rough-in.
−## Each work-area outlet shall consist of a faceplate and one or more 8-position modular jacks of the specified category, mounted in a flush wall box, surface-mount box, or modular furniture raceway as shown on the drawings.
+### Every insert position of a faceplate or a floor box fitting that is not occupied by a jack shall be fitted with a blank insert of the same manufacturer and color.
−## A two-port outlet is the practical default for a general work area - one port for the workstation and one spare for a phone, access point, or second device - because adding a drop later is far more expensive than terminating a spare port now. Higher-density or specialty locations may warrant more ports or a consolidation-point topology. {note}
+## Modular Jacks and Faceplates {toc}
−## Each modular jack shall be of the same category and shielding construction as the horizontal cable it terminates.
+### Each work-area outlet shall consist of a faceplate or a furniture or floor box fitting with eight-position modular jacks of the category and shielding of the horizontal cable, each jack terminated on its own horizontal cable.
−## A consolidation point (CP), where used, shall be a passive interconnection in the horizontal pathway, located so that no segment from the CP to the work-area outlet is shorter than 15 m, and shall be administered as a separate component per ANSI/TIA-606-D.
+### Modular jacks shall be wired to the scheme indicated in the datasheet.
```datasheet
−label: Ports per work-area outlet
+label: Modular Jack Wiring Scheme
type: radio
options:
− - 1 port
− - 2 ports
− - 4 ports
− - 6 ports
−default: 2 ports
+ - "T568A"
+ - "T568B"
+default: "T568B"
```
+### Both schemes are recognized by ANSI/TIA-568.2 and perform identically; they differ only in which pairs land on positions 1 and 2 and 3 and 6, and a plant wired to both is a plant with crossed pairs at every mixed link. T568B is the scheme on most commercial plants in the United States, which is why it is the default; T568A is selected to match an existing plant wired that way or where a federal or campus standard requires it. {note}
+
+### One wiring scheme shall be used at every jack, every patch panel, and every consolidation point on the project.
+
+### Modular jacks shall be of a snap-in form that can be replaced individually without replacing the faceplate.
+
+### Faceplates and surface-mount housings in finished spaces shall match the color and the material of the wall plates selected under [[sync/wiring-devices]] for the same space, and faceplates on walls shall be of the size and gang that the outlet box provides.
+
+### Each faceplate shall carry a label holder or a labeling surface for the identifier of each jack, and each jack position shall be identified as required under Administration and Labeling.
+
+### A jack in a damp or wet location, in an open parking structure, or outdoors shall be installed in a housing of the enclosure rating required under Termination Enclosure Rating, with a cover that protects the jack when no cord is inserted.
+
+# Backbone Cabling {toc}
+
+## Backbone Copper Cabling {toc}
+
+### The copper backbone cabling between telecommunications spaces shall be as indicated in the datasheet.
+
```datasheet
−label: Outlet mounting
+label: Backbone Copper Cabling
type: radio
options:
− - Flush wall box
− - Surface-mount box
− - Modular furniture raceway
− - Floor box / poke-through
−default: Flush wall box
+ - "None, optical fiber backbone only"
+ - "Multipair Category 3 cable for analog voice circuits"
+ - "Four-pair cable of the horizontal category for backbone links within 100 m"
```
+### A building whose telephones are IP devices on the horizontal cabling needs no copper backbone, and most new buildings run fiber only between their telecommunications rooms, with the analog lines that remain, such as the elevator telephone, the fire alarm communicator, and a fax line, carried on a small multipair cable or on the horizontal; a multipair Category 3 backbone carries analog voice and other low-rate circuits to 800 m and is selected where a telephone system or a campus voice plant still terminates on copper blocks; a four-pair backbone of the horizontal category carries Ethernet between two spaces fewer than 100 m apart and with Power over Ethernet, which a small building with two rooms on one floor is served by. Which circuits remain analog is decided by the Owner's telephone and alarm systems, so the field carries no default. {note}
+
+### Where a multipair backbone is selected, the cable shall be terminated on insulation displacement blocks or patch panels of the same category at both ends, with every pair terminated and the pairs identified by the standard color code.
+
+### Where a four-pair backbone is selected, each backbone link shall comply with the length, the category, and the certification requirements of a horizontal channel under this standard.
+
+## Backbone Optical Fiber {toc}
+
+### The optical fiber backbone shall include cable of every fiber type indicated in the datasheet.
+
```datasheet
−label: Horizontal topology
−type: radio
+label: Backbone Optical Fiber Types
+type: checkbox
options:
− - Direct (TR to work-area outlet)
− - Consolidation point (CP) in horizontal pathway
−default: Direct (TR to work-area outlet)
+ - "OM1"
+ - "OM2"
+ - "OM3"
+ - "OM4"
+ - "OM5"
+ - "OS2"
+constraint: all_of
```
−## Copper Patch Panels {toc}
+### OM3 and OM4 are laser-optimized 50 µm multimode fibers: OM3 carries 10 Gb/s to 300 m and OM4 to 400 m with the same transceivers, OM4 carries 40 Gb/s and 100 Gb/s parallel optics to 150 m, and the two cost nearly the same per strand. OM5 carries several wavelengths on one strand for short-wavelength multiplexing, which lets a duplex strand pair carry 100 Gb/s to 150 m, at a premium per strand and with transceivers that fewer switches offer. OS2 singlemode carries 10 Gb/s to 10 km and 100 Gb/s to 2 km or more, costs less per strand than multimode, and costs more per transceiver, so it is selected for every link whose length or planned rate exceeds the multimode reach and increasingly for the whole backbone. OM1 and OM2 are legacy fibers of 62.5 µm and 50 µm core, selected only to extend an existing plant of that type. A backbone with both multimode and singlemode strands is common, which is why the field accepts more than one type. {note}
−### Copper terminations in the telecommunications room shall land on rack-mounted patch panels of the same category and shielding as the horizontal cable.
+### Every strand of every backbone cable shall be terminated at both ends on the connector style selected under this standard, including strands held for future use, so that no strand is left unterminated in a cable.
−### Patch panels shall be sized and quantified to terminate all installed horizontal cables plus the project's spare-capacity allowance, and shall be labeled per ANSI/TIA-606-D.
+### Backbone strands assigned to another system, including the strands serving a distributed antenna system under [[sync/distributed-antenna-systems]], shall be identified by that assignment in the cable record and on the enclosure label.
+### Where a multimode link exceeds the reach that ANSI/TIA-568.3 or the transceiver manufacturer publishes for the fiber type and the application the Owner designates, the link shall be furnished in OS2 singlemode fiber in addition to or in place of the multimode strands, and the substitution shall be reported to the Engineer of Record before the cable is ordered.
+
+## Backbone Fiber Cable Construction {toc}
+
+### Backbone optical fiber cable inside the building shall be of the construction indicated in the datasheet.
+
```datasheet
−label: Copper patch panel port density
+label: Backbone Fiber Cable Construction
type: radio
options:
− - 24-port (1U)
− - 48-port (2U)
−default: 24-port (1U)
+ - "Tight-buffered distribution cable"
+ - "Indoor and outdoor rated loose-tube cable"
+ - "Interlocking armored cable"
+default: "Tight-buffered distribution cable"
```
+### Tight-buffered distribution cable carries each fiber in a 900 µm buffer that is terminated directly, bends tightly, and is the construction of nearly every in-building backbone, which is why it is the default; indoor and outdoor rated loose-tube cable carries the fibers in gel-filled or dry-blocked tubes that need a breakout kit or fan-out at termination, and is selected where a backbone cable passes from the entrance facility into an outdoor pathway or a damp below-grade run without a splice; interlocking armored cable adds a metallic armor that takes the place of a conduit in a space where the cable is exposed to damage, and is bonded as a metallic member under [[sync/telecommunications-bonding]]. {note}
+
+### Backbone cable installed in a location exposed to physical damage, including an unfinished space below 2.4 m above the floor without a raceway, shall be interlocking armored cable or shall be installed in a raceway under [[sync/raceways-and-conduit]], whatever the datasheet selects.
+
+### Backbone cable that passes from the inside of the building into a wet or outdoor pathway shall be listed for the wet location and shall be water-blocked, whatever the datasheet selects.
+
+## Fiber Connectors {toc}
+
+### Optical fiber shall be terminated with connectors of the style indicated in the datasheet at every patch panel, enclosure, and outlet.
+
```datasheet
−label: Patch panel termination style
+label: Fiber Connector Style
type: radio
options:
− - 110 punch-down
− - Toolless / keystone
−default: 110 punch-down
+ - "LC"
+ - "SC"
+ - "ST"
+ - "MPO array connector"
+default: "LC"
```
−# Optical Fiber Cabling {toc}
+### The LC connector is the small-form-factor duplex connector that every current switch, transceiver, and enclosure accepts, and it is the connector on nearly every new plant, which is why it is the default; SC is the larger push-pull connector of plants built before the LC and is selected to match them; ST is the bayonet connector of older plants and is selected only to extend one; the MPO array connector carries 8, 12, or 24 fibers in one ferrule and is the connector of parallel optics and of factory-terminated trunks, selected for a high-density backbone or a data room where ports are counted by the hundred. A plant can carry MPO trunks between enclosures and LC at the adapter panel through a cassette, which is what the termination method article provides for. {note}
−## Backbone, riser, and any long horizontal runs shall use optical fiber of the grade and strand count specified below, terminated on fiber adapter panels in distribution-area enclosures.
+### Multimode connectors shall be of the ultra physical contact polish, singlemode connectors shall be of the ultra physical contact or the angled physical contact polish as the Owner's equipment requires, and one polish shall be used throughout each link, with angled connectors and adapters identified green.
−## Fiber grade is selected by reach, not by habit. Multimode (OM4/OM5) is economical for in-building backbone up to a few hundred metres at 10 to 100 Gigabit; singlemode (OS2) is required for campus inter-building reach and for any run exceeding the multimode distance budget. {note}
+### Where a system warranty is selected, connectors and adapters shall be the connectivity manufacturer's products, and in every case the connector shall be listed by the cable manufacturer or the connector manufacturer for the fiber type furnished.
−## Multimode Fiber {toc}
+## Fiber Termination Method {toc}
−### OM4 is the default multimode grade for new riser and backbone: it supports 10GBASE-SR to 550 m and 40/100GBASE-SR4 to 150 m, and it costs the same as or less than the obsolete OM3. OM3 is still code-compliant but offers no cost advantage; OM1 and OM2 shall never be specified for new work.
+### Optical fiber shall be terminated by the method indicated in the datasheet.
−### OM5 wideband multimode extends OM4's reach for short-wavelength-division-multiplexing (SWDM4) transceivers and is a premium, future-proofing selection for high-density spines; it is not required for typical backbone. {note}
−
−### Multimode fiber furnished for new backbone or riser cabling shall be OM4 or OM5; OM3 shall be used only to extend an existing OM3 plant, and OM1 and OM2 shall not be furnished.
−
```datasheet
−label: Multimode fiber grade
+label: Fiber Termination Method
type: radio
options:
− - OM3 (existing-plant extension only)
− - OM4
− - OM5
−default: OM4
+ - "Fusion-spliced factory-terminated pigtails"
+ - "Field-installed mechanical or pre-polished connectors"
+ - "Factory-terminated and factory-tested trunk assemblies"
```
−## Singlemode Fiber {toc}
+### A fusion-spliced pigtail puts a factory-polished connector on every strand with a splice loss of a few hundredths of a decibel, needs a splicer and a splice tray in every enclosure, and is the method where the strand count is high and the technician is equipped for it; a field-installed connector is terminated in the enclosure with a cleaver and a hand tool, costs the least per termination on a small count, and carries the loss of a mechanical splice inside the connector and the variability of the hand that made it; a factory-terminated trunk is cut to a measured length, terminated and tested at the factory, and pulled with its connectors in a protective sleeve, which gives the tightest loss and the shortest schedule where the route is measured accurately and the lead time is available, and fails where the length is guessed. The strand count, the route, and the schedule decide between them, so the field carries no default. {note}
−### OS2 singlemode fiber shall be furnished for campus inter-building backbone and for any in-building run whose length or future bandwidth exceeds the multimode budget; OS2 supports 10GBASE-LR to 10 km, 100GBASE-LR4 to 2 km, and 400GBASE-FR4 to 2 km.
+### Where factory-terminated trunks are selected, the length of every trunk shall be measured in the field along the installed route before the trunk is ordered, and a trunk shall not be ordered from a drawing scale.
+### Where field-installed connectors are selected, every connector shall be inspected with a video microscope and shall meet the insertion loss required under Optical Fiber Testing, and a connector that does not shall be cut off and re-terminated.
+
+## Array Connector Polarity {toc}
+
+### Where the MPO array connector is selected, every array link shall be built to the polarity method indicated in the datasheet.
+
```datasheet
−label: Singlemode fiber grade
+label: Array Connector Polarity Method
type: radio
options:
− - OS2
−default: OS2
+ - "Method A"
+ - "Method B"
+ - "Method C"
```
−## Fiber Connectors, Strand Count, and Polarity {toc}
+### The three methods of ANSI/TIA-568.3 differ in where the transmit-to-receive crossover is made: Method A makes it in one of the two patch cords, so the cords at the two ends differ; Method B makes it in the trunk by reversing the fiber order, so the cassettes at the two ends differ; Method C makes it inside the trunk by swapping pairs. Each works when every component in the link is built for it, and a link that mixes methods passes an OTDR trace with the glass continuous and fails the loss test with transmit and receive crossed. The method follows the parallel optics the Owner's equipment uses and the connectivity manufacturer's cassette line, so the field carries no default. {note}
−### Fiber shall be terminated with LC duplex connectors for low-density and patch applications, or MPO/MTP array connectors (12- or 24-fiber) for high-density trunk and spine applications, as specified.
+### One polarity method shall be used throughout every array link from the equipment port at one end to the equipment port at the other, and the method shall be recorded on the enclosure label and in the cable record.
+# Entrance Facility Cabling {toc}
+
+## The cabling from the point at which each service provider's cable enters the building to the demarcation at which the provider's responsibility ends, and from the demarcation to the equipment room cross-connect, shall be furnished under this standard, and the demarcation location shall be as indicated on [[drawing: the telecommunications plans]].
+
+## The service provider's cable up to and including the demarcation is furnished by that provider under its agreement with the Owner, and the Contractor's work begins at the demarcation; the primary protector on a metallic entrance cable and the bonding of the entrance cable shield are under [[sync/telecommunications-bonding]], and the entrance conduit and the entrance room are under [[sync/telecommunications-rooms-and-pathways]]. {note}
+
+## The Contractor shall coordinate the demarcation hardware, its mounting, and the pathway from the demarcation to the equipment room with each service provider before the entrance facility is roughed in, and shall report to the Engineer of Record any provider requirement that the contract documents do not provide for.
+
+## Entrance cabling between the demarcation and the equipment room shall be of the backbone types selected under this standard and shall be terminated, labeled, and tested as backbone cabling.
+
+# Connecting Hardware in the Telecommunications Room {toc}
+
+## Patch Panels {toc}
+
+### Horizontal balanced twisted-pair cables shall be terminated in the telecommunications room on rack-mounted patch panels of the style indicated in the datasheet, of the same category and shielding as the cable.
+
```datasheet
−label: Fiber connector type
+label: Patch Panel Style
type: radio
options:
− - LC duplex
− - MPO/MTP 12-fiber
− - MPO/MTP 24-fiber
−default: LC duplex
+ - "Modular panel accepting snap-in jacks"
+ - "Fixed-port panel with insulation displacement rear termination"
+ - "Factory-terminated cassette panel"
```
−### Pre-terminated MPO trunk assemblies and cassettes are preferred over field termination for backbone fiber: factory-polished and factory-tested ends deliver tighter, more repeatable insertion loss than field termination and compress installation schedule. {note}
+### A modular panel takes the same snap-in jacks the outlets use, so one jack type is stocked, a failed port is replaced from the front, and a port can be a shielded, a fiber, or a blank insert in the same panel, at a higher cost per port; a fixed-port panel terminates each cable on a printed-circuit block at the rear and is the lowest-cost and highest-density panel, with a failed port repaired only by re-terminating the block; a cassette panel holds factory-terminated modules that are plugged in rather than punched down, which suits a trunk-and-cassette plant and a schedule that cannot wait for field termination, at the highest cost. The panel follows the warranty program and the jack line, so the field carries no default. {note}
−### Where MPO/MTP connectivity is used, a single polarity method (Type A, Type B, or Type C) shall be applied consistently across the entire link end to end.
+### Patch panels shall be sized to terminate every horizontal cable serving the room plus the spare port capacity indicated in the datasheet, as a percentage of the horizontal cables terminated.
```datasheet
−label: MPO polarity method
−type: radio
+label: Patch Panel Spare Port Capacity
+type: range
+unit: '%'
options:
− - Type A
− - Type B
− - Type C
−default: Type B
+ min: 0
+ max: 50
+ setpoints: [0, 10, 20, 25, 50]
+constraint: min
```
−### Mixing MPO polarity methods on one link is an insidious defect: it can pass an OTDR trace (the glass is continuous) yet fail an end-to-end optical loss test because transmit and receive fibers are crossed. Lock the polarity method down in the design narrative and verify it on every trunk. {note}
+### Spare ports on the panel at turnover are the ports that the next outlet, the next camera, or the next access point lands on without a new panel, and they cost rack units and panel ports now; a tenant who will reconfigure the floor buys 20 to 25 percent, a building that is built out once buys 10 percent, and an Owner who adds panels as needed buys none, so the field carries no default. {note}
−### The number of backbone fiber strands provided per pathway shall be specified, sized to accommodate current connections plus spare capacity for future growth.
+### Every patch panel shall be installed with a horizontal cable manager of the same width directly above or below it, and horizontal cables shall be dressed to the rear of the panel on the manufacturer's rear cable management with the cable weight supported by the manager and not by the terminations.
+### Patch panels shall be grouped on the rack by the service and the floor area they serve, in the order shown on the rack layout submitted, and shall be labeled as required under Administration and Labeling.
+
+## Fiber Enclosures {toc}
+
+### Optical fiber shall be terminated in rack-mounted or wall-mounted enclosures fitted with adapter panels or cassettes of the connector style selected, with slack storage, splice trays where the termination method requires them, and bend radius protection at every point inside the enclosure.
+
+### Each enclosure shall provide adapter positions for every strand terminated plus not fewer than 25 percent spare adapter positions, and shall be lockable where the room is shared with another tenant or another trade.
+
+### Fiber enclosures shall be mounted with the cable entering from the rear or the side through a strain relief that holds the cable jacket and the strength members, so that no load is carried by the buffered fibers.
+
+## Cross-Connect Scheme {toc}
+
+### Active equipment ports shall be connected to the horizontal and backbone patch fields by the scheme indicated in the datasheet.
+
```datasheet
−label: Backbone fiber strand count per pathway
−type: range
−unit: strands
−min: 12
−max: 144
−step: 12
−default: 24
+label: Cross-Connect Scheme
+type: radio
+options:
+ - "Interconnect, equipment cords from the equipment ports directly to the horizontal patch panels"
+ - "Cross-connect, equipment ports terminated on a second patch field and patched to the horizontal patch panels"
+default: "Interconnect, equipment cords from the equipment ports directly to the horizontal patch panels"
```
−## Fiber Patch Panels {toc}
+### An interconnect runs one cord from the switch port to the patch panel port, has one cord and two connections per link in the room, and is the arrangement in nearly every telecommunications room where the switch and the panels sit in the same rack, which is why it is the default; a cross-connect terminates the switch ports on their own patch field and patches between the two fields, which adds a cord and two connections to every link and lets the switch be replaced without touching the horizontal field or any cord to it, which a large equipment room with many switches and an operator who changes them often is served by. {note}
−### Fiber terminations shall land on rack- or wall-mounted fiber enclosures fitted with the specified adapter type, with adequate slack storage and bend-radius protection inside the enclosure.
+### Where a cross-connect is selected, the equipment patch field shall be of the same category and shielding as the horizontal field, and the equipment cords from the switch ports to it shall be furnished under this standard whatever the patch cord supply selection.
+## Patch Cords and Equipment Cords {toc}
+
+### Patch cords, equipment cords, and work-area cords shall be furnished by the party indicated in the datasheet.
+
```datasheet
−label: Fiber patch panel / enclosure density
+label: Patch Cord Supply
type: radio
options:
− - 24-port (1U)
− - 48-port (1U)
− - 96-port (2U)
−default: 48-port (1U)
+ - "Work-area cords and equipment cords furnished under this standard"
+ - "Equipment cords furnished under this standard, work-area cords by the Owner"
+ - "No cords furnished, all cords by the Owner"
```
−# Telecommunications Rooms and Spaces {toc}
+### Cords furnished under this standard are tested as part of the channel, come from the warranty program where one is selected, and arrive with the plant, so that the first device plugged in on move-in day is on a warranted channel; cords furnished by the Owner are bought with the equipment, in the lengths the furniture turns out to need, and at the Owner's price, and the channel warranty then depends on the Owner buying from the program. Who installs the switches and who moves the furniture decides the split, so the field carries no default. {note}
−## Telecommunications rooms (TR), equipment rooms (ER), and distribution areas (MDA/IDA) shall be provided, sized, and located per ANSI/TIA-569-E and BICSI TDMM to house the cabling termination, cross-connect, and active equipment for the area served.
+### Every cord furnished under this standard shall be factory-terminated and factory-tested, of stranded conductors, of the same category, shielding, and wiring scheme as the horizontal cabling, listed to UL 1863, and of the connectivity manufacturer's product line where a system warranty is selected.
−## A telecommunications room shall be located so that no horizontal cable run from it to a served outlet exceeds the 90 m permanent-link limit, giving a nominal 90 m service radius.
+### No cord shall be made in the field, and no cord shall be longer than the shortest standard length that reaches its ports without strain on the connectors.
−## As a planning rule of thumb, provide at least one telecommunications room per floor and one TR for each 1,000 m² (about 10,000 ft²) of served floor area.
+### Where cords are furnished under this standard, one equipment cord shall be furnished for every horizontal and backbone port the Owner designates as active in a port activation list furnished before testing begins, and one work-area cord for every jack so designated.
−## A multi-story building shall have a telecommunications room on every occupied floor; serving upper floors from a single lower-floor TR drives horizontal runs past 90 m and produces a non-compliant plant. Stacked, vertically aligned TRs also simplify the backbone riser.
+### Optical fiber cords shall be duplex cords of the same fiber type and connector polish as the strands they connect, with the fiber type identified by the jacket color ANSI/TIA-598 assigns, and shall be furnished in the quantity the port activation list requires.
−## Under-sizing a telecommunications room is one of the most expensive mistakes in the plant, because adding floor area after construction is rarely feasible. Rooms that look adequate on Day 1 run out of ladder-rack and termination space within a few years once moves, adds, and changes accumulate; size for growth, not just initial fill. {note}
+# Administration and Labeling {toc}
−## Telecommunications Room Sizing {toc}
+## Administration Class {toc}
−### Each telecommunications room shall provide the floor area specified below, with continuous plywood or equivalent backboard, ladder rack or cable tray, and rack space sized for the served port count plus the spare-capacity allowance.
+### The cabling plant shall be administered under ANSI/TIA-606 at the class indicated in the datasheet.
```datasheet
−label: Telecommunications room minimum floor area
−type: range
−unit: m²
−min: 0.93
−max: 10
−step: 0.5
−default: 9.93
−```
−
−```datasheet
−label: Distribution hierarchy
−type: radio
+label: Administration Class
+type: select
options:
− - Home-run (each TR to MDA)
− - Hierarchical (TR to IDA to MDA)
−default: Home-run (each TR to MDA)
+ - "Class 1, a single telecommunications space"
+ - "Class 2, a single building with several telecommunications spaces"
+ - "Class 3, several buildings on one campus"
+ - "Class 4, several campuses or sites"
+default: "Class 2, a single building with several telecommunications spaces"
```
−# Pathways {toc}
+### The class sets how much of the plant is identified and recorded: Class 1 identifies the links and the one space they land in; Class 2 adds the identification of every telecommunications space, the backbone between spaces, the pathways, and the bonding, which is what a building with more than one telecommunications room needs to be administered and is the case of most buildings, which is why it is the default; Class 3 adds the campus backbone and the outside-plant records that a multi-building site needs; Class 4 adds a site identifier to every record for an Owner who administers several campuses from one system. {note}
−## Telecommunications cabling shall be supported in conduit, cable tray, or on independent J-hooks/bridle rings dedicated to telecommunications, and shall never rest on ceiling tiles, ductwork, piping, or electrical conduit.
+### Where Class 3 or Class 4 is selected, the identifier format shall incorporate the building and site identifiers the Owner's existing administration system uses, and the Contractor shall obtain those identifiers from the Owner before the administration plan is submitted.
−## Pathway selection, conduit sizing, and tray sizing are governed by [[sync/raceways-and-conduit]] and [[sync/cable-tray]]; this section states only the fill, support, separation, and bend-radius limits that the cabling itself imposes. {note}
+## Labels and Records {toc}
−## Conduit and pathway initial fill shall not exceed 40 percent per ANSI/TIA-569-E so that spare capacity remains for future moves, adds, and changes.
+### Every horizontal cable, backbone cable, modular jack, patch panel port, fiber adapter position, consolidation point, and enclosure shall carry a unique identifier in the format of the administration plan, and the identifier of a cable shall be the same at both of its ends.
−## Cables not installed in conduit or cable tray shall be supported at intervals not exceeding 1.5 m (5 ft) by J-hooks, bridle rings, or equivalent cable supports per ANSI/NECA/BICSI-568.
+### Labels shall be machine-printed on a material listed to UL 969 for the surface and the environment, legible without magnification, and applied so that the label on a cable is within 300 mm of each termination and the label on a faceplate or a panel is visible with cords installed.
−## Telecommunications cabling shall maintain a minimum separation of 50 mm (2 in.) from unshielded power conductors of 120 V or less, or be separated by a listed barrier or divider, per NEC Article 800 and ANSI/TIA-569-E.
+### The identifier of each jack shall be marked on the faceplate at that jack and on the patch panel at the port the same cable terminates on, so that a technician at either end reads the same identifier.
−## Greater separation is required from higher-voltage or higher-current power circuits and from fluorescent/LED ballasts and motors; where separation cannot be maintained, a grounded metallic barrier or metallic conduit shall be used.
+### Terminations shall be color-identified by the color scheme of ANSI/TIA-606 for the type of termination, applied on the label, the jack, or the patch panel icon as the administration plan states.
−## Copper cable bend radius shall not be less than 4 times the cable outside diameter during installation and 8 times the outside diameter at rest; optical fiber bend radius shall not be less than 15 times the cable outside diameter at rest, or the manufacturer's published minimum where greater.
+### The cable record shall list every cable, its identifier, its type and category, its two termination points, its length, and its test result, and shall be delivered in an electronic format the Owner can edit and with every identifier matching the labels and the record drawings.
−## Maximum pulling tension shall not exceed the cable manufacturer's published limit (commonly 110 N / 25 lbf for 4-pair copper); exceeding it stretches the twisted pairs and permanently degrades NEXT and return-loss performance.
+### A plant whose labels, record drawings, and cable record agree can be administered by anyone the Owner employs; a plant whose labels were applied from the design drawings rather than from the installed cable is traced with a toner from the first move onward. {note}
−```datasheet
−label: Maximum pathway fill (initial)
−type: range
−unit: "%"
−min: 25
−max: 40
−step: 5
−default: 40
−```
+# Installation {toc}
−```datasheet
−label: Cable support spacing (outside conduit/tray)
−type: range
−unit: m
−min: 1.0
−max: 1.5
−step: 0.1
−default: 1.5
−```
+## Pulling and Routing {toc}
−## Cable Routing and Pathway Coordination {toc}
+### Cable shall be installed only in the pathways furnished under [[sync/telecommunications-rooms-and-pathways]], [[sync/cable-tray]], and [[sync/raceways-and-conduit]], and shall not rest on a ceiling grid, a ceiling tile, ductwork, piping, a sprinkler line, or the conduit or cable of another system.
−### Telecommunications room locations, backbone riser sleeves, and main horizontal pathways shall be shown on the coordination drawings and coordinated with mechanical, electrical, and structural trades before rough-in. {note}
+### Balanced twisted-pair cable shall be pulled with a tension not exceeding 110 N on a four-pair cable, and optical fiber cable with a tension not exceeding the manufacturer's published maximum, using a tension-limiting device or a breakaway swivel where the pull is by machine.
−### Pathway routing conflicts with ductwork, sprinkler mains, and structural beam penetrations are the single largest source of structured-cabling RFIs. Resolving TR locations and backbone sleeve positions in early trade coordination, rather than in the field, avoids costly rerouting and out-of-spec workarounds. {note}
+### Balanced twisted-pair cable shall not be bent to a radius less than four times its outside diameter for unshielded cable and eight times for shielded cable, and optical fiber cable shall not be bent to a radius less than ten times its outside diameter at rest and fifteen times under pulling load, or the manufacturer's published minimum where greater.
−### Backbone riser sleeves and floor penetrations are located as indicated. [[drawing: riser sleeve locations]]
+### A cable that has been kinked, crushed, stretched, or bent below its minimum radius shall be replaced for its full length, and a splice shall not be used to repair a horizontal cable.
−### Telecommunications room locations are as indicated. [[drawing: TR/ER floor-plan locations]]
+### Cable shall be bundled with hook-and-loop straps or the pathway's own retention, and shall not be bundled with cable ties cinched tight, stapled, or compressed by a support.
−# Firestopping {toc}
+### A service loop of not less than 3 m shall be left on each horizontal and backbone cable in the telecommunications room, coiled within the bend radius and stored on the pathway or the rack, and a service loop of not less than 300 mm shall be left at each outlet where the box or the housing accommodates it.
−## Every telecommunications cable penetration through a fire-resistance-rated wall, floor, or partition shall be firestopped with a listed firestop system whose F-rating equals or exceeds the rating of the penetrated assembly, per NEC Article 800/770 and IBC Section 714.
+### Balanced twisted-pair cable shall maintain the separation from power conductors that NFPA 70 800.133 and ANSI/TIA-569 require, and where a horizontal cable crosses a power conductor the crossing shall be at right angles.
−## Re-enterable firestop systems (putty, pillows, or modular sleeves) should be used at frequently modified penetrations such as TR sleeves so that future moves, adds, and changes do not require destroying and rebuilding the seal.
+## Terminations and Dressing {toc}
−## Contractors routinely skip firestopping at cable penetrations because it is buried above ceilings and easy to defer. The specification shall require listed firestop systems explicitly and require the rated penetrations to be documented at closeout, so the omission is caught before it becomes a life-safety violation.
+### At every balanced twisted-pair termination, the pairs shall remain twisted to within 13 mm of the termination point, the cable jacket shall be removed only as far as the termination requires, and the pairs shall be terminated in the wiring scheme selected.
−# Administration and Labeling {toc}
+### Every modular jack and patch panel port shall be terminated with the manufacturer's termination tool for the product, and a termination that was made with a different tool shall be re-terminated.
−## The cabling system shall be administered per ANSI/TIA-606-D: every cable, termination, outlet, patch panel, telecommunications space, and pathway shall carry a unique identifier that is consistent across labels, record drawings, and the cable-management database.
+### Cables at the rear of a patch panel shall be dressed in the order of their port numbers, supported on the rear cable management, and bundled by panel so that any cable can be traced from the panel to the pathway.
−## A documented administration scheme is what makes a structured cabling plant maintainable: without consistent labeling and an as-built database, every future move, add, or change becomes a trace-and-tone exercise. Omitting it, or leaving it to each contractor's habit, produces an undocumented plant that the owner cannot manage. {note}
+### Optical fiber shall be terminated with the buffered fiber routed in the enclosure's trays without a bend below the fiber's minimum radius, with every unused adapter position fitted with a dust cap and every connector end face inspected and cleaned before mating.
−## Class 2 administration (links, spaces, pathways, and bonding labeled and documented) shall be the minimum administration tier; higher classes apply where multiple buildings or extensive pathway records are required.
+## Penetrations and Abandoned Cable {toc}
+### Every cable penetration of a fire-resistance-rated wall, floor, or smoke barrier shall be sealed with a listed firestop system under [[sync/firestopping]] before the penetration is concealed, and the sleeves through which the cables pass are furnished under [[sync/telecommunications-rooms-and-pathways]].
+
+### Cable installed under this standard that is not terminated at both ends and identified for future use shall not be left in place, and existing cable that the project renders abandoned, as NFPA 70 800.25 defines it, shall be removed to the point of accessible concealment or tagged for future use as the contract documents direct.
+
+### Where the contract documents do not state whether existing abandoned cable is removed or tagged, the Contractor shall report the quantity and the location of such cable to the Engineer of Record before concealing the new work, and the Engineer of Record shall direct the disposition.
+
+# Field Certification Testing {toc}
+
+## Test Scope and Instruments {toc}
+
+### Every horizontal link, every backbone link, and every optical fiber strand installed under this standard shall be field tested after installation and before acceptance, and a sampled test shall not be accepted in place of a test of every link.
+
+### Field testing is the only objective evidence that the plant meets its category: a visual inspection cannot find a marginal near-end crosstalk failure, a reversed pair behind a faceplate, or a connector with a scratched end face, and a link that is not tested is a link the Owner finds when a device on it fails. {note}
+
+### Balanced twisted-pair links shall be tested with a field test instrument of the accuracy level of ANSI/TIA-1152-A indicated in the datasheet.
+
```datasheet
−label: TIA-606-D administration class
−type: radio
+label: Field Tester Accuracy Level
+type: select
+derived: "the horizontal cable category selected under this standard"
options:
− - Class 1 (single TR)
− - Class 2 (single building, multiple spaces)
− - Class 3 (campus, multiple buildings)
− - Class 4 (multi-site enterprise)
−default: Class 2 (single building, multiple spaces)
+ - "Level IIe"
+ - "Level III"
+ - "Level IIIe"
+ - "Level IV"
+ - "Level 2G"
+default: derived
```
−# Testing {toc}
+### The accuracy level follows from the category tested: Level IIe qualifies an instrument to 100 MHz for Category 5e, Level III to 250 MHz for Category 6, Level IIIe to 500 MHz for Category 6A, Level IV to 1000 MHz for a plant tested to a higher class, and Level 2G to 2000 MHz for Category 8, so the level is derived from the category rather than chosen, and an engineer overrides it only to require an instrument of a higher level than the category needs. {note}
−## All copper permanent links and all fiber segments shall be field-tested after installation, and 100 percent of links shall pass before acceptance. Failing links shall be re-terminated or replaced and re-tested. {note}
+### Every test instrument shall have been calibrated by its manufacturer or a laboratory the manufacturer accepts within the twelve months before the test, shall run the firmware version current at the time of testing, and shall be fitted with the permanent link adapters or channel adapters of the configuration tested.
−## Field testing is the only objective evidence that the installed plant meets its specified grade; visual inspection cannot reveal a marginal NEXT failure or an excessive splice loss. Specify it, require the native result files, and require 100 percent passing - not a sampled subset. {note}
+### The test instrument, its serial number, its firmware version, its calibration date, and the adapters used shall be recorded in every test result.
−## Copper Testing {toc}
+## Balanced Twisted-Pair Testing {toc}
−### Copper permanent links shall be tested with a Level III or better field tester to the ANSI/TIA-568.2-E permanent-link limits for the installed category, including insertion loss, NEXT, PS-NEXT, ACR-F (ELFEXT), PS-ACR-F, return loss, propagation delay, and delay skew.
+### Each balanced twisted-pair link shall be tested in the configuration indicated in the datasheet, to the limits of ANSI/TIA-568.2 for that configuration and for the category installed.
−### Test result files shall be delivered in the instrument's native format together with a summary identifying any links that initially failed and were corrected.
−
```datasheet
−label: Copper test configuration
+label: Balanced Twisted-Pair Test Configuration
type: radio
options:
− - Permanent link
− - Channel
−default: Permanent link
+ - "Permanent link"
+ - "Channel"
+default: "Permanent link"
```
−## Fiber Testing {toc}
+### The permanent link test measures the installed cable and its two terminations with the instrument's own adapters, which is the work the Contractor controls and the configuration a system warranty is registered on, which is why it is the default; the channel test includes the patch cords and the work-area cord, which proves the link as the device sees it and is run where the cords are furnished under this standard and the Owner wants the channel proven as delivered. {note}
−### Tier 1 optical loss testing (OLTS) shall be performed bidirectionally on every fiber segment per ANSI/TIA-526-14 (multimode) or ANSI/TIA-526-7 (singlemode), with measured loss not exceeding the calculated link-loss budget.
+### Every test shall include every transmission parameter that ANSI/TIA-568.2 requires for the configuration and the category tested, together with wire map, length, and propagation delay, and where Power over Ethernet of Type 3 or Type 4 is selected, the DC resistance unbalance parameters required under Power over Ethernet.
−### Tier 2 OTDR testing shall be performed on all backbone fiber segments at the applicable wavelengths (850/1300 nm for OM3/OM4/OM5; 1310/1550 nm for OS2) to verify and localize splice and connector events.
+### Alien crosstalk on Category 6A and Category 8 links shall be tested to the scope indicated in the datasheet.
−### Tier 1 OLTS measures end-to-end loss but cannot tell you where a defect is; an OTDR trace localizes each splice and connector event. Omitting Tier 2 on backbone runs leaves no way to find a marginal splice without re-pulling the cable, so specify it for all backbone fiber. {note}
+```datasheet
+label: Alien Crosstalk Field Test Scope
+type: select
+options:
+ - "Not field tested, component compliance of the cable and hardware accepted"
+ - "Sampled links selected as ANSI/TIA-568.2 describes"
+ - "Every link"
+```
−### Mated-pair insertion loss shall not exceed 0.75 dB for an LC duplex connection or 0.35 dB per mated MPO array, per ANSI/TIA-568.3-E.
+### Alien crosstalk is the coupling between adjacent cables in a bundle, and it is the parameter that limits 10GBASE-T; a plant built of Category 6A cable and hardware that the manufacturer has qualified as compliant meets it by construction, and most projects accept that compliance without a field test because the test takes a second instrument on a neighboring link and hours per bundle; a sample tests the longest and most tightly bundled links, which is where the coupling is worst; every link is tested where the plant will carry 10GBASE-T throughout and the Owner wants the margin documented. The installed bundle sizes and the application decide, so the field carries no default. {note}
+### A link whose result is a marginal pass shall be re-terminated and retested, and shall be accepted only on a pass without a marginal indication.
+
+### A link that fails any parameter shall be corrected by re-termination or by replacement of the cable, shall be retested in full, and shall not be accepted until it passes.
+
+## Optical Fiber Testing {toc}
+
+### Every optical fiber strand shall be tested to the tier indicated in the datasheet.
+
```datasheet
−label: Fiber test tier
+label: Optical Fiber Test Tier
type: radio
options:
− - Tier 1 (OLTS) only
− - Tier 1 (OLTS) + Tier 2 (OTDR)
−default: Tier 1 (OLTS) + Tier 2 (OTDR)
+ - "Tier 1, optical loss test of every strand"
+ - "Tier 1 on every strand and Tier 2 optical time-domain reflectometer trace on backbone strands"
+ - "Tier 1 and Tier 2 on every strand"
```
−```datasheet
−label: Maximum mated-pair insertion loss (LC duplex)
−type: range
−unit: dB
−min: 0.30
−max: 0.75
−step: 0.05
−default: 0.75
−```
+### A Tier 1 test measures the end-to-end loss and the length of each strand with a light source and a power meter, which proves the strand meets its loss budget and is what ANSI/TIA-568.3 requires at minimum; a Tier 2 trace from a reflectometer locates and measures every connector and splice along the strand, which is the only way to find a marginal splice or a bent fiber without pulling the cable, and it is added on backbone strands because a backbone is long, spliced, and expensive to replace, and on every strand where the Owner wants a baseline trace for every link; a Tier 2 trace does not replace the Tier 1 loss measurement. The length and the splice count of the plant decide, so the field carries no default. {note}
−# Installation {toc}
+### Tier 1 tests shall be performed in both directions at 850 nm and 1300 nm on multimode strands under ANSI/TIA-526-14 and at 1310 nm and 1550 nm on singlemode strands under ANSI/TIA-526-7, using the one-jumper reference method and, for multimode, a source that meets the encircled flux launch condition.
−## Cabling shall be installed neatly and in a workmanlike manner per ANSI/NECA/BICSI-568, with pairs maintained twisted to within 13 mm (0.5 in.) of the termination point and the cable jacket maintained as close to the termination as practical.
+### Where a Tier 2 test is selected, the trace shall be taken in both directions at the same wavelengths as the Tier 1 test, with a launch cord and a tail cord of not less than 150 m so that the first and last connectors are measured.
−## Pulling tension, bend radius, slack, and support spacing shall comply with the Pathways section of this standard and with the cable manufacturer's published installation limits.
+### The measured loss of each strand shall not exceed the optical loss budget submitted for that link, computed from the cable attenuation at the test wavelength, not more than 0.75 dB per mated connector pair, and not more than 0.3 dB per splice, as ANSI/TIA-568.3 provides.
−## Service-loop slack shall be left at each outlet and in each telecommunications room (typically 300 mm / 12 in. at the outlet and 3 m / 10 ft in the TR) to permit re-termination and rack rearrangement without re-pulling cable.
+### Every connector end face shall be inspected with a video microscope and cleaned before every test and every mating, and a connector whose end face shows a scratch, a pit, or contamination in the core zone after cleaning shall be re-terminated.
−## Abandoned (unused) cable shall be removed to its termination or to the point of accessible concealment per NEC Article 800.25, unless tagged for future use.
+### A strand that exceeds its loss budget or shows an event above the connector or splice limit on a trace shall be corrected by re-termination or re-splicing, retested, and accepted only when it meets the budget.
−## Cables shall be dressed and bundled with hook-and-loop straps, not cable ties cinched tight; over-tightened cable ties deform the cable geometry and degrade high-frequency performance.
+## Test Failures and Reports {toc}
+### The cost of correcting a failed link and of every repeated test shall be borne by the Contractor, including the cost of the Engineer of Record's or the commissioning authority's time to witness a repeated test where witnessing is required.
+
+### Test results shall be delivered in the native file format of the test instrument and as a summary report that lists every link by identifier, its configuration, its result, the margin on the governing parameter, the instrument data required under Test Scope and Instruments, and every link that failed and the correction made.
+
+### Where the project is commissioned, the test results shall be delivered to the commissioning authority as inputs under [[sync/commissioning]], and acceptance of the cabling plant shall not be withheld for the commissioning authority's review of a result that passes.
+
+### The Engineer of Record may witness any test, and the Contractor shall give not less than five working days' notice before testing of a floor or a backbone begins.
+
# Delivery, Storage, and Handling {toc}
−## Cable reels and cartons shall be delivered in the manufacturer's original packaging and stored indoors, off the floor, and protected from moisture, dust, and physical damage until installation.
+## Cable shall be delivered on the manufacturer's original reels or in its original cartons with the listing marks, the category or fiber type, and the length intact and legible, and each reel shall be inspected on receipt for damage to the cable and the reel flanges.
−## Cable shall not be installed at temperatures below the manufacturer's minimum installation temperature, as cold jackets crack and conductors are more easily damaged during pulling.
+## Cable shall be stored indoors in a dry space within the manufacturer's published storage temperature range, off the floor, and protected from moisture, dust, paint, and physical damage until it is installed, and a cable listed for indoor use only shall not be stored outdoors under a cover.
−## Fiber cable reels shall be stored and transported on end (reel axis horizontal) and shall not be dropped, as shock loads can fracture the glass without visible jacket damage.
+## Optical fiber reels shall be stored and moved on their flanges with the reel axis horizontal, shall not be laid flat, dropped, or rolled over an edge, and the ends of every fiber cable shall be sealed until the cable is terminated.
+## Connecting hardware, jacks, and cords shall remain in their packaging until the location is ready for them, and a jack or a cord contaminated by paint, joint compound, or construction dust shall be replaced at no cost to the Owner.
+
+## Cable and hardware that are damaged, wet, or show a broken or missing listing mark at receipt or at installation shall be rejected and replaced at no cost to the Owner.
+
# Warranty {toc}
−## The Contractor shall register and deliver the manufacturer's system warranty for the installed cabling plant, of the tier selected under Quality Assurance, covering both the components and the application-assurance performance of the channel.
+## Where a system warranty is selected, the connectivity manufacturer shall warrant the installed channels against defects in the cable and the connecting hardware and shall warrant that each channel supports the applications the installed category is rated for, for the term indicated in the datasheet, measured from the date of warranty registration.
−## The Contractor shall separately warrant installation workmanship for a minimum of one year from substantial completion, covering defects in termination, dressing, labeling, and support.
+```datasheet
+label: System Warranty Term
+type: range
+unit: years
+options:
+ min: 15
+ max: 25
+ setpoints: [15, 20, 25]
+default: 25
+constraint: min
+```
−# Spare Parts {toc}
+## The 25-year term is the one most connectivity manufacturers offer on a registered system and the one most Owners write, which is why it is the default; 20 years and 15 years are the terms of some programs and of some component lines within a program, and a project whose manufacturer offers only the shorter term records it here rather than leaving the warranty unregistered. {note}
−## The Contractor shall turn over spare connecting hardware to the Owner at closeout so that routine moves, adds, and changes can be made without procurement delay.
+## The Contractor shall warrant the installation, including every termination, every label, the dressing and support of every cable, and the results of the certification tests, for the period indicated in the datasheet, measured from the date of substantial completion.
−## Spare components shall match the installed system's manufacturer and product line so that warranty coverage is preserved when they are placed in service.
+```datasheet
+label: Installation Workmanship Warranty Period
+type: range
+unit: years
+options:
+ min: 1
+ max: 5
+ setpoints: [1, 2, 3, 5]
+default: 1
+constraint: min
+```
+## A one-year workmanship warranty is the term of the construction contract on most projects, which is why it is the default; a longer term is written where the Owner has been left with a plant whose terminations loosened after the first year and wants the installer rather than the manufacturer answering for it. {note}
+
+## Warranty corrective work shall include re-termination or replacement of the failed link, retesting under Field Certification Testing, correction of the labels and the cable record, and repair of finishes disturbed by the repair, at no cost to the Owner.
+
+## A link repaired or replaced under warranty shall be warranted for a full new term equal to the original period from the date of the repair, or for the remainder of the original period, whichever ends later.
+
+## Where the parties disagree whether a failure within the warranty period results from workmanship, from a product defect, or from damage by others after acceptance, the Engineer of Record shall make the initial determination.
+
+# Spare Parts {toc}
+
+## The Contractor shall deliver spare patch cords and equipment cords of each type, length, and color furnished, in the quantity indicated in the datasheet as a percentage of the cords installed, and shall obtain a signed receipt for them.
+
```datasheet
−label: Spare modular jacks (percent of installed)
+label: Spare Patch Cords Furnished
type: range
−unit: "%"
−min: 0
−max: 10
−step: 1
−default: 5
+unit: '% of installed cords of each type'
+options:
+ min: 0
+ max: 25
+ setpoints: [0, 5, 10, 15, 20, 25]
+constraint: min
```
+## The Contractor shall deliver spare modular jacks, faceplates, blank inserts, and fiber adapters of each type and color furnished, in the quantity indicated in the datasheet as a percentage of the installed count of each type, and shall obtain a signed receipt for them.
+
```datasheet
−label: Spare patch cords (percent of active ports)
+label: Spare Jacks and Faceplates Furnished
type: range
−unit: "%"
−min: 0
−max: 10
−step: 1
−default: 5
+unit: '% of installed count of each type'
+options:
+ min: 0
+ max: 25
+ setpoints: [0, 5, 10, 15, 20, 25]
+constraint: min
```
+
+## A spare quantity is sized to the Owner's own moves, adds, and changes: an Owner with an in-house technician stocks 10 percent of jacks and cords and re-terminates its own outlets, an Owner who calls a contractor for every change stocks a few of each, and an Owner who buys from the warranty program as needed stocks none and records a zero here, so no quantity is the norm and the field carries no default. {note}
+
+## Spare parts shall be identical to the installed items in manufacturer, category, shielding, connector style, and color, shall be delivered in their original packaging, and shall be labeled with the item type and the telecommunications room they are stocked for.