|
Cabling
Standards: Per-Floor Telecommunications Wiring
Systems
Download
PDF Version 2.0 Cabling Standards
Cabling Standards Section Links
Per-Floor Telecommunications
Wiring Systems
Installation and physical protection of Category 6 cable is a very critical
element for the cable to deliver its rated bandwidth. Any kinks, pinches,
a bend radius less than 1.25 inches in diameter, or stretching of the
cable by exceeding the 25 pound maximum pulling tension during installation
will damage the cable to the point that it will not meet rated specifications
and must be replaced.
Requirements for terminating of Category 6 cable require no more than
the minimum amount of the common sheath be removed than is required for
termination and no more than 1/2 inch of untwisting of conductors. Installation
personnel shall be BICSI certified installers or equivalent and provide
proof of certification.
The minimum wiring system specifications are described
below. Please
note that Category 5 or Category 5e is NOT acceptable.
- Typical Office Configuration: Each
office will be configured to include at least two boxes with a minimum
of three Category 6 cables. The boxes are ideally located on
opposing walls. However, for each project the Design Team in consultation
with ITS will make the determination of the exact cabling configuration
for each room.
- Typical Lecture Classroom Configuration: A typical
classroom that is used for lecture will be configured to include at
least four Category 6 jacks to support voice and/or data. However,
for each project the Design Team in consultation with ITS will make
the determination of the exact cabling configuration for each room.
- Cables: Category 6 cable is
required and will consist of twisted pair, 100 Ohm cable which has
transmission capabilities up to 250 MHz, and is ETL verified to TIA/EIA-568-B.2
Category 6 specifications. Category
6 cable will be used for both horizontal and backbone cable. It will
have two insulated conductors twisted together to form a pair and four
pairs laid up to form the basic unit. Horizontal cable shall also meet
the requirements of clauses 4.3.3.1 to 4.3.3.6 of ANSI/TIA/EIA-568-B.2.
Backbone cable shall meet the requirements of clauses 4.4.3.1 to 4.4.3.6
of ANSI/TIA/EIA-568-B.2.
- Cabling Specification: The
preferred type of communication cable shall be verified with ITS during
the design phase of each project. However, Berk-Tek Landmark
1000 plenum rated cable is recommended.
- Connecting Hardware and Cords: Connecting
hardware and cords must also be Category 6 certified and meet the
requirements ofclauses 6.1 through 6.3 of ANSI/TIA/EIA-568-B.2
and clause 7.2.1.3 and 7.4.4 of the original standards documentation
- Cabling Runs: The cable run from the Telecommunications
Room to the telecommunications outlet, consisting of at least two cables,
shall not exceed 295 feet and contain no splices. These cables are
to provide service for both voice and data communications as an integrated
telecommunications system.
- Cable Ends: At the user end of the cables, in the
outlet box, there shall be 12 inches of slack after termination to
facilitate future re-terminations. At the Telecommunications Room the
wire shall reach the punch down patch panel and have 3 feet of slack.
Cable shall be routed so the 3 feet of slack is managed in a neat bundle
and not coiled.
- Labeling: The contractor is
expected to provide tags, straps, and adhesive labels. These tags, straps, and adhesive
labels must be of high quality that will endure over time. Hand
written labels are not acceptable. The contractor is required
to provide labels for all station cable at ten inches of the termination
ends, using Brady type self-laminating cable markers or equal. Station
cables will be labeled on both ends with the wall plate numbers according
to the ITS labeling standards for cabling systems.
ITS Labeling Convention
MDF/IDF rooms are top be designated TD(A-E). The
first floor equipment room is to be identified as TDA. Additional
MDF/IDFs are to follow alphabetically.
Each data/phone Cat. 6 cable in each building
is to have a unique number beginning with the number 1. The cable is to be labeled at both
ends with the TD letter identifier and the cable number. An example
of a cable label would be TDB 103. The TDB designates the B equipment
room and the 103 is the unique cable number.
The patch panel and racks are to be labeled with the unique cable number.
The room faceplates are to be labeled with the TDA at the top of the
faceplate and each jack with the unique cable number.
Download example http://www.smccd.net/accounts/itwirespecs/img/typ_data_voice_outlet.pdf
- Clearances: The installation of these data and voice
cables shall conform to the following clearances:
- At least 127 millimeters (5 inches) from power lines carrying
2KVA or less
- At least 305 millimeters (12 inches) from power lines carrying
from 2 to 5KVA
- At least 915 millimeters (36 inches) from power lines carrying
more than 5KVA
- At least 127 millimeters (5 inches) from all fluorescent lights
and other sources of electromagnetic interference such as electric
motors, HVAC equipment, arc welders, intercoms, etc.
- Category 6 Parts: The following list is the recommended
Category 6 specifications for required components and parts. All specifications
are for Panduit parts and are the current ITS network standards.
- Patch Panels Mini-Com Modular 24 Port, Panduit Part #CPP24WBL
- Mini-Jack Category 6, 8-wire RJ-45 Universal 568 A/B, Orange
in color, Panduit Part #CJ688TOR For use with Patch Panels
, Faceplates and surface mount box’s
- Surface Mount Boxes 2 Module, Off White in color, Panduit Part
#CBXJ2IW-A
- Surface Mount Boxes 4 Module, Off White in color, Panduit Part
#CBXJ4IW-A
- Mini-Mod Blanks for Unused spaces in Faceplates and Surface Mount
Boxes, Panduit Part #CMBIW-X
- Faceplates, 2 Module Space, Single Gang, Off White, Panduit Part
#CFPE2IW
- Faceplates, 4 Module Space, Single Gang, Off White, Panduit Part
#CFPE4IW
- Faceplates, 6 Module Space, Single Gang, Off White, Panduit Part
#CFPE6IW
- High-density rack mount panel kit. GP6™ PLUS Category 6
High Density Rack Mount Panel Kits; Panduit Part # GPB2884R4WJ
- Faceplate Labeling: A printed label will be placed
on the faceplate of each telecommunication outlet according to the
ITS labeling standards.
- Exposed Wiring & Conduits: No open or exposed
wiring or conduits will be permitted below finished ceilings. Ivory
colored surface raceway, Wiremold 2100 with a 2144-2 box (or equivalent)
can be used in places where "fishing" of walls is not possible.
- Testing: Each basic link shall be tested and certified
to according to Category 6 standard and all industry standard test
data recorded and supplied to ITS in a digital format. The
transmission parameters to be tested are based on the TIA-EIA 568B
Standards for Category 6 cabling. For each transmission parameter
where applicable, the cable, connecting hardware and cords shall be
tested for the parameter under the following categories:
- Individual test parameter for cable
- Individual test parameter for connecting hardware
- Permanent Link
- Channel
- Work Area Cords, Patch Cords and Equipment Cords
More information about the current standard can be found at http://cablingdb.com/Standards/568B/TIA-EIA-B2-1_Cable_Specifications.asp
The transmission parameters to be tested to meet Category 6 standards
include:
- Insertion Loss
- Near End Cross Talk (NEXT) and Power Sum Near End Cross Talk (PSNEXT)
Loss
- Cabling Pair-to-Pair Channel and Permanent Link NEXT loss
- Cable Power Sum NEXT Loss
- Work Area, Equipment, and Patch Cord Pair-to-Pair NEXT Loss
- FEXT and ELFEXT Loss
- Connecting Hardware Pair-to-Pair FEXT Loss
- Permanent Link and Channel Pair-to-Pair ELFEXT
- Power Sum ELFEXT (PSELFEXT)
- Cable Power Sum ELFEXT
- Permanent Link and Channel Power Sum ELFEXT
- Return Loss
- Horizontal Cable Return Loss
- Stranded Conductor Cable Return Loss
- Connecting Hardware Return Loss
- Work Area, Equipment, and Patch Cord Return Loss
- Permanent Link and Channel Return Loss
- Propagation Delay and Delay Skew
- Cable Propagation Delay
- Permanent Link and Channel Propagation Delay
- Cable Propagation Delay Skew
- Permanent Link and Channel Propagation Delay Skew
- Balance
- Cable and Connecting Hardware LCL
- Longitudinal Conversion Transfer Loss (LCTL)
|
