| INSTALLATION
Documentation
Prior to the start of
Installation, it is important to evaluate and document
the existing cable plant, making note of the layout
and distances between facilities and cabling pathways.
A useful method of recording and documenting this information
can be found in the EIA/TIA 606 Administration Standard.
This document also provides useful standards for using
colored labels to color code segments of your cabling
plant.
Once the structure of the plant has been evaluated and
all required modifications noted, a daily work; schedule
can be laid out for review with the client. When the
plan is approved, installation can begin. Any unexpected
circumstances that arise during installation should
be immediately resolved with the customer.
Cable Handling
One of the most critical
requirements in installing Category 5 cable is making
sure that the cable is never bent beyond a 90 degree
angle.A cable bend radius of 4 times the diameter of
the cable is recommended (on a 4-pair cable, this is
approximately one inch). The bend radius translates
to special handling concerns when mounting face plates
at work stations. Extra cable length should be minimized
and special care taken when feeding the cable into the
wall outlet while mounting the face plate.
Also, exercise care any time a cable pull occurs over
or around an edged or cornered surface where excessive
force may disturb the geometry of the pairs. Maximum
pulling tension on a 4-pair cable is 25 pounds.
The following chart summarizes other guidelines necessary
for proper Installation:
Do's
-
Store the
cable in a protected, moisture-free area
-
Avoid unnecessary
bends
-
Replace
damaged cable
-
Make all
connections via patch panels or cross connect blocks
-
Use velcro
straps, nail-on cable clamps and D-rings to support
and position the cable
-
Use separate
compartments in cable tray for power and telecommunication
cables
-
Avoid sources
of heat such as heating ducts and hot water pipes
-
Avoid all
sources of EMI (electromagnetic Interference)
-
Maintain
24 inches minimum separation from fluorescent lighting
ballasts
-
Maintain
the same pin-pair assignment throughout the cabling
plant.
Don’ts
-
Step on
the cable
-
Exceed
the maximum bend radius of 4 times the diameter
-
Exceed
the maximum tensile loading of pounds
-
Over-tighten
cable ties or cords
-
Splice,
bridge tap or repair cable
-
Use staple
guns
-
Overstress
the cable
-
Run power
cables in conduit with telecommunication cables
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