Information Technology Reference
In-Depth Information
TABLE 1.2
Typical Bill of Materials
Quantity
Description
A/R
Cable, 4 twisted pair, 24 gauge, Category 5e, plenum-rated
A/R
Cable, 4 twisted pair, 24 gauge, Category 5e, riser-rated, gray or white
48
Plate for modular jack, ivory
48
8-pin jack module, Category 5e, wired per T568A, ivory
2
Patch panel, 24 position, Category 5e
2
Mount for patch panel
48
User cord, 3 m, Category 5e, stranded twisted pair, PVC (non-plenum),
gray
48
Patch cord, 1 m, Category 5e, stranded twisted pair, PVC (non-plenum),
yellow
2
Duct, fingered, 3 in
3 in, 6-ft length (cut to 2-ft lengths for patch cord
management)
A/R
2 in, 6-ft length (for vertical cable entrance into
wiring closet/patch panel area)
NOTE: Quantities shown are for two floors, 24 work areas per floor, and one LAN cable per work area. Some stan-
dards, such as TIA/EIA-568-C, recommend two cables per work area. An existing telephone cable at each work
area would yield the total of two cables.
Duct, fingered, 2 in
There will also be some differences in quality and pricing. All the items should
be certified by their manufacturers to meet the Category 5e performance criteria you
have set. To implement the two-cables-per-workstation suggestion of TIA/EIA-568-
B, you will need to double many of the quantities.
The wall plates, user and patch cords, and cable are generally available in a
variety of colors. The wall plates and user cords are usually color coordinated to the
office. The color choices are somewhat limited, so you may have to go with a neu-
tral color such as gray or ivory. Surface raceway is also available in color choices.
Patch cords technically fall under the miscellaneous category of EIA/TIA-569-A and
are ideally yellow in color. However, if your wiring closet is actually a vacant wall
in a common area, and a sea of yellow wire would distract from the decor, you may
wish to specify a more neutral color. The EIA/TIA police will never know (we hope).
A typical floor layout showing the telecommunications outlets and direct cable
runs to the TR. You should allow 25% to 50% more cable for cable trays and
obstacle avoidance.
The instructions to the installers will be as follows. Pull the station cables as
home runs, with no splices, from each workstation outlet location to the TRs on each
floor, avoiding electrical wires, pipes, motors, and fluorescent light fixtures. The sta-
tion cables will be run from each outlet through hollow walls to the space above the
ceiling grid. Outlets may be surface mounted on solid walls and the cable placed in
