Technical Requirements -
T/D Cabling Design Guide
3. UTP Cables
A. Electrical Parameters
All Unshielded Twisted Pair (UTP) cable shall be insulated 24 AWG round,
solid copper conductors enclosed in a thermoplastic jacket.
B. Fire Ratings
The insulation and jacketing for cable conductors shall meet the NEC listed
fire rated cable insulation requirements in both plenum and non-plenum
applications, as required. If the use of plenum rated (CMP) insulation is
indicated for the horizontal cable, all four pairs of the Category 5 UTP cable
wires shall be FEP insulated.
4. Patch Panel Racks
A. Outline Dimensions
The Contractor will provide and locate equipment racks in the Computer
Room and Telephone/Data closets. The racks shall be of open bay type, 84
inches high, with 19 inch mounting rails, suitable for mounting electronic
equipment. The rack locations shall be coordinated with the Contracting
Officer's Technical Representative (COTR).
B. Cable Management & Service Clearance
Provision for cable management shall be integral to the rack structure and
include horizontal rings, vertical rings, and premise cable routing. The
provision shall not block access to the rack mounting holes. A minimum
service clearance of 3'- 6" front and rear of the front mounting holes shall be
provided.
C. Reserved Rack Space
Rack space shall be reserved for mounting Government furnished network
device(s). Space requirements shall be coordinated with the COTR.
5. UTP Patch Panel Certifications & Pin/Pair Assignments
UTP cables shall be terminated in RJ45, insulation displacement contact (IDC)
punch down patch panels. Pin/pair assignments shall be T568A as specified in
ANSI/TIA/EIA 568-A, Figure 10-1. UTP patch panels shall be Category 5.
6. Telephone / Data Cross-Connects And Equipment Cables
All data patch cables and equipment cables shall be Category 5 stranded
copper 24 gauge, terminated at each end with Category 5 certified RJ-45
connectors. All telephone cross-connect wiring shall be round solid copper, 24-
gauge. Telephone patch cords and associated connecting equipment are not
permissible. Only cross connect hardware used to terminate UTP cables of the
IDC type shall be allowed for telephone circuits.
Page 4-34
VBA Design Guide
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