DETAILED
WIRING/INSTALLATION SPECIFICATIONS
1. Technical Requirements
Architecture/Topology
Summary
1.1 Provide all labor, materials, tools
and equipment to install data wiring consistent with IEEE EIA/TIA 568B, TSB-36,
TSB-40A and IEEE 802.3 100Base-T specification. Each data location will be
provisioned with four pair category 5e
UTP cable employing 568B termination using.
1.2 A star or modified-star topology is
required in the design of the distribution system.
Transmission
Media
1.3 All cabling employed will meet or
exceed the requirements and specifications for Category 5e, eight conductor,
four pair unshielded twisted pair cable for LAN applications through data rates
of 100 Mb/s.
1.4 All voice grade cable used will
meet or exceed requirements for Category
5e, eight conductor; four pair unshielded twisted pair cable.
1.5 All cable used will be 24 AWG
copper that adheres to communications application requirements for copper media
as specified in NEC Section 800. All cable must meet UL listings standards for
CM, CMR, CMP, CL2, and CL3.
1.6 The wiring standard used for Data
Jacks will be EIA/TIA 568B .
1.7 All network component hardware used
in this installation will be certified by the manufacturer for data transport
to 100 Mb/s. All panels, cables,
outlets, connectors, couplers, cords, and jumpers used in this installation
will be provided and installed consistent with standards contained in EIA/TIA 568B, TSB-36, and TSB-40A.
2. Connection
Hardware and Design
2.1 The cross connect hardware must be
designed for flexibility to allow for future expansion and administration. The
design for data network cabling will be based on AT&T 110 Jack panel system using standard 8 pin, 8-position
modular jacks. The design for
voice cabling will be based on AT&T 110 cross connect system.
2.2 Cross-connect hardware must be
color coded to indicate the respective fields and source of terminating
leads. As follows:
Blue: Wiring
from workstation information outlets to cross connect system.
Green: Wiring
from workstation information outlets to cross connect system.
Gray: Voice
wiring from the information outlet to the cross connect system.
Yellow: Circuits
from the Central Office (TELCO)
Orange: Circuits
from the switch/PBX/KSU ports.
White: House
pairs from riser cables between the equipment room and satellite closets.
3. Equipment
Room
3.1 Voice cross connect fields will be
mounted on the wall in compliance with state
and local codes.
3.2 The data network cabling will
terminate at a free standing or wall mounted rack. Unless otherwise noted, and
space permitting, all main distribution frame (MDF) wiring closets will utilize
7-foot freestanding data racks (Technology must approve the placement of all
racks.) Where floor mount data racks
are utilized, racks must be both bolted to floor and secured to walls and meet
all code requirements for seismic conditioning. At no time can racks, punch-down blocks or enclosures be
secured to bare walls. A fire
treated, 3/4-inch minimum plywood backboard must be first installed. All data racks must be grounded.
3.3 Exposed wire pairs will be
protected and meet NEC requirements before terminating at the cross connect field.
4. Satellite
Closet Design
4.1 Satellite closet(s) or Intermediate Distribution Frame(s)
will be located so that the maximum cable distance between Main closet or Main Distribution Frame and
Intermediate Distribution Frame(s) does not exceed 600′.
4.2 The data network cabling will
terminate at a free standing or wall mounted rack. When utilizing wall mount
racks at IDF wiring locations, utilize a "swing-style" wall mount data rack,
preferably with a minimum of 36-inch high X 19-inch wide by 18-inch deep. Racks must be mounted securely onto a
fire treated 3/4-inch minimum plywood backboard. Racks mounted to wall must not exceed the height of 6 feet.
All data racks must be grounded. Safety, security, and space utilization will be considered in the design
of the Intermediate Distribution Frame(s).
4.3 Exposed wire pairs will be
protected and meet NEC requirements before terminating at the cross connect field.
5. Information
Outlets (Data Jacks)
5.1 Information outlets will be wired
with EIA/TIA 568B standards.
5.2 RJ45 outlets will be used for voice
and data drops.
6. Installations
Technique
6.1 Where possible, and as the lowest
cost solution, flush mounted wall outlets will be installed.
6.2 Wiring is to be installed inside
the walls, and run above ceilings or in crawl spaces or passage ways/utility
chases below the floors.
6.3 Any required surface mount cable
runs will be protected by the Contractor provided Wiremold/Panduit raceway.
6.4 Wiring runs will not obstruct
walkways or service access to mechanical/electrical equipment. All cable shall
be self-supported and attached to the structure as required by code. Cable will follow a common path
whenever possible, and will not run closer than 18" from any AC power or signal
source.
6.5 All Category 5e cable runs shall be
tested bi-directionally for end-to-end continuity and polarity. Testing must be
performed by a recognized manufacturer’s unit (WireScope, Fluke, MicroTest, etc. ), that performs all
required certification tests at 350MHz. Each run tested must meet current EIA/TIA 568B standards. Hardcopy of each run’s test results,
along with a disk backup, are required by the District. Each hardcopy test result must show the
run’s unique identity number. Additionally, data runs shall be tested to meet TSB-40A specifications
for attenuation and, NEXT, and return loss requirements. This means that each individual wire
run, after termination, will be certified with a category 5e qualified testing
device.
All test results are to be documented and turned over
to Technology and Information Services.
6.6 Each cable run will be tagged at
both ends with the same assigned numbers or letters. All jacks, will be labeled with the corresponding connection
at the cross-connect field.
6.7 Materials that may be required by
the vendor for horizontal sub-system includes, but is not limited to, the
following:
Horizontal Cable (four pair cabling for outlets)
Wall outlets and faceplates at all locations
All cross-connect fields and wiring termination
Wire distribution rings, racks, raceway or troughs
All Fire stops required by code
Labor and material required to restore vendor-damaged
surfaces (walls, ceilings and floors).
Additional required materials. Examples: tie wraps,
face plates, anchors, support hardware, clamps, labeling equipment, and labels.
6.8 Vendor functions include the
following work items for installation of the horizontal sub-system:
Placing all cabling
Mounting and labeling information outlets
Placing cross-connects
Terminating cables
Cleaning the work area upon completion
Removal of all old replaced cable (related to the
project)
7. Penetrations and
Supports
Humboldt County Office of Education requires that all
penetrations of firewalls 1-inch or greater must be sleeved with metal
conduit. The conduit must extend a
minimum of 18-inches on either side of the fire wall and must be capped with
connectors and bushings. The
conduit fill cannot exceed more than 60 per cent of the conduit’s
capacity. Any penetrations smaller
than 7/8-inch or less does not require metal sleeving, but must be filled with
fire-rated sealant. All conduit, after installation of cable, must also be filled
and sealed with fire-rated sealant. Please note it is the contractor’s responsibility to meet all state,
local, and federal building code requirements.
As a rule, all wiring closet and floor
penetrations/sleeving must be a minimum of 4-inches in diameter. As stated above, all code requirements
relevant to fire rating must be observed by the contractor.
At no time may cables be supported by any temporary
building structure, i.e., conduit, duct work, water pipes, T-bar ceiling tiles
and/or support wires. Again, it is
the responsibility of the Contractor to meet all state, local, and federal
building codes. All cable must be
supported above the ceiling approximately every (4) to (6) feet. Usage of metallic D-rings and drive
rings are permitted. All cable
ties above the ceiling must be plenum rated. Non-plenum rated cable ties are permitted within the wiring
closets area. All cables must be
neatly bundled and supported in a professional manner.
Any cable
runs in exposed public viewing areas, i.e., classrooms, hallways, etc., must be
enclosed in raceway. All raceway
must be secured with the use of anchors/screws. At no time will the exclusive use of double "sticky" backed
tape be permitted. All raceway
caps/splices must be secured. If
nonmetallic raceway is utilized, all splice caps, ceiling caps, etc., must be
secured to the raceway. Use of a
silicone based adhesive is permitted.
8. Documentation
All cable testing documentation will be included as
part of the "AS-BUILT" drawings or layouts. These drawings will show all outlet
locations, routes taken, and any core-drill/penetrations that were
performed. Outlet locations shown
will include their respective unique identity numbers. As-Built documentation is due within
three (3) weeks after any wiring installation is accepted by the County as
complete. FINAL PAYMENT will not be issued until the As-Builts are
furnished to the Technology Department and is approved. Failure to provide this documentation
in the time frame stated will be cause for cancellation of the contract.
All documentation will be furnished to the
Information Network Services Department. A copy of the test results and the Contractor must also maintain as-built
drawings for a minimum period of one (1) year from the time of acceptance by
the County.
All Category 5 voice backbone cables
must be tested for continuity. It
is the responsibility of the Contractor to assure the County that all pairs are
functioning and are positioned correctly on both ends of the voice backbone
punch-down fields. The County will
be responsible for cross-connect from the voice backbone punch-down fields to
the voice Category 5e enhanced punch down fields.
9. Fiber
Optic Cabling
District
specifications require a minimum of six (6) fiber strands, multi mode,
62.5/125um between each main building wiring closet (MDF) and its respective
(IDF) wiring closets, unless otherwise noted. All cable must be plenum rated and run within plenum rated
inner-duct. All ends will be
terminated on ST Style connectors. All terminated connectors will be mounted inside fiber optic enclosures. Enclosures will be rack mounted when
utilizing floor mounted data racks, and wall mounted when utilizing wall mounted
data racks. All fiber strands will
be tested bidirectionally at both 850nm and 1300nm wavelengths utilizing an
OTDR.
10. Warranty
The contractor shall warrant all labor and material
supplied for a period of one year from the date of final testing and acceptance.
11. Data
Jack Examples:
RJ11/RJ45 RJ11/DUAL
RJ45 DUAL
RJ45 DUAL
RJ11/DUAL RJ45 QUAD RJ45
LOW VOLTAGE WIRING PRACTICES
NEW STRUCTURES
1. All
low-voltage wiring shall be run in cable trays or raceways in all ceiling,
mechanical and/or concealed spaces.
2. Wherever
possible, control panels for low-voltage systems (fire alarm, intercom, clock,
telephone, etc.) shall be situated to allow for common routing of main wiring
runs.
3. Low-voltage
wiring runs will be kept separated from high voltage wiring to minimize
interference.
4. Low-voltage
wiring, whether in trays or free running, shall run either with structural
elements of the building, or at 90o to structural elements. Line of sight "spider web" wire runs shall not be allowed.
5. Low-voltage
wiring runs shall be laid out in such a manner as to allow ample service access
to other mechanical or electrical equipment that is in the same space.
6. In
suspended ceiling systems, access to equipment above the ceiling shall not be
blocked by an accumulation of wires, cables, optical fiber cables and raceways
that prevents removal of access panels, including suspended ceiling
panels. Wiring shall be suspended
according to State and Federal codes.
7. Each
wire run shall be clearly identified and labeled. Wire runs shall be identified at all junction and pull boxes
and within 10 feet of any access point in ceilings, voids or plenums. Wires shall be identified within 10
feet of through wall fittings, conduits or nipples. As-built drawings and O & M manuals will list wiring
runs keyed to the field identification.
8. Remove
all old replaced wire. (related to
the project)
EXISTING
STRUCTURES
1. As
much as possible, low-voltage wiring installed in existing structures as a
retrofit shall conform to the same requirements described for new structures.
2. In
most cases trays or raceways will not be available so it is important that good
workmanship practices be followed:
a. It is the
responsibility of the Contractor to become aware of the presence of asbestos in
the particular project facility. The County will provide site surveys for each facility at each site and
at no time is the Contractor to disturb asbestos material. Any remediation necessary because of
Contractor’s work shall be charged back to the Contractor.
b. Wiring shall run
either with or at 90o to building
structural elements.
c. Wire
runs shall be grouped together as much as possible. Individual runs shall be neatly "branched" off main run
looms.
d. All wiring shall
be supported and protected as required by code from structural members of the
building.
e. Mechanical,
plumbing, or other electrical lines, conduit or equipment shall not be used for
support of low-voltage wiring. Low-voltage wiring shall not be draped across this equipment.
f. Wire runs
shall be kept clear of walkways, access points, and service areas in spaces
shared with other equipment.
g. Penetrations of
existing walls shall be neatly made. Holes shall be resealed after wires have been run.
h. Wire runs
penetrating firewalls shall be done according to code with openings resealed so
as to maintain the required fire rating.
Workmanship:
1. Low-voltage
wiring should be laid out neatly with straight runs and with sweep 90o bend radiuses.
2. Wiring
in terminal and junction boxes should be neatly laid out, not just bunched
together. Wires terminating at
"punch down blocks" should be brought in neatly.
CATV SYSTEMS SPECIFICATIONS
1. WORK
INCLUDED:
The
system will include, but not be limited to: incoming service, filters, amplifiers, directional couplers,
splitters, room outlets, terminators, fittings, and cable. It will be designed and capable of
delivering a signal of +3 – to – +9 dB at room outlets from a 5 MHz to 1 GHz
CATV source.
Directional
couplers and splitters should be accessible for later service or modifications,
e.g., room additions, outlets moved, etc.
2. QUALITY
ASSURANCE:
The
completed television distribution system will supply ghost and noise-free
signals of adequate signal strength of +3 – to – +9 dB at each outlet in the
building.
The
completed system should be in compliance with FCC Specifications 76.605 and
76.609H for maximum allowable signal leakage.
Information: The local cable company is required by
the FCC to disconnect any source of leakage. Contact the installation foreman or the leakage compliance
inspector from ATT or Suddenlink Cable to check for leakage before final
project acceptance.
Test
and log at final inspection to verify that system meets specifications (signal
strength, ghost and noise-free signal, and leakage compliance).
Visual
inspection of system should be made before covering.
3. SPECIFICATIONS:
A. Amplifiers should
be:
1. Broadband, CATV
(an amplifier designed to pass the low, mid, high, super, and hyper bands), 120 channel, 75 ohm distribution amplifier. The amplifier will have a continuously
variable adjustable gain of 10 dB and a slope control range of 16 dB at 50-750
MHz, as well as being capable of 2-way RF transmission.
2. Shall meet or
exceed Blonder Tongue models BIDA-750-30 with BIDA-RA Return Amplifier option
installed.
3. If possible and
appropriate, provide an amp with 20% more power than now needed to provide for
future expansion needs.
B. Cable should be:
1. 75
ohm coaxial, foil shielded, 60% braid or greater, foam dielectric, RG 6.
It
should meet or exceed: Comm/scope
model F660bvp
Comm/scope
model F660bvr
Comm/scope
model F660bvv
2. The selection of
which type of coax cable to use will be determined by local and national
electrical codes.
3. Cable should be
installed prior to finish cover, and secured in place to prevent movement or
abrasion. A pull line will be
included if in conduit.
4. Route outlets
through directional couplers (instead of splitters) to home run lines to
splitters and head end.
C. Fittings should be:
1. 75
ohm, solderless type connectors, as necessary to accommodate number of
outlets, 50 MHz – 1 GHz operation.
2. Shall meet or
exceed LRC models F56 CHI.
D. Splitters should be:
1. Splitters will
have at least 120 dB RFI shielding.
2. Shall meet or
exceed Regal "Gold Label" models GS2DGH, GS3DGH, GS4DGH, and GS8DGV.
E. Directional Couplers
should be:
1. Couplers with a
minimum isolation between output and tap of 20 dB.
2. Shall meet or
exceed Regal models RDCT10-6 through 30.
F. Room Outlets
should be:
Antenna
outlets, 75 ohm barrel coupler in steel wall plates, with a signal level of +3
– to – 6dB. Mount flush in wall
using a single mud ring and 4 inch square, 2-1/8 inch deep box.
4. ADDITIONS
TO CATV SYSTEMS
Should
meet previously stated new construction specifications, as well as comply with
FCC leakage requirements.
5. SUBMITTALS
A. Copies of
as-built, product data, installation, and record drawings should be provided to
Information and Network Services and on occasion to the Maintenance Department.
B. As-built drawings will
show directional couplers, splitters, and distribution amplifier placement.
C. Copies of both test and
log of system and leakage reports will be provided to Maintenance and Information
and Network Services.