UFC 3 -520-01
June 10, 2002
G-3.2.3.8 The minimum power requirement for each CER and TC is two 20 a mpere
dedicated branch circuits. Each room should also have normal 120 volt convenience
outlets spaced every 1.5 meters (5 feet) on all walls. The CER must have adequate
power to support the C -CS equipment and power requirements can be greater
depending on the equipment planned for the room. The planning engineer should
coordinate power requirements with the base communications and information
personnel and/or the project engineer.
G-3.2.3.9 As a minimum requirement, the CER and TC should have plywood
backboards on all walls, from no greater than 0.31 meters (1 foot) above the finished
floor level to no less than 2.1 meters (7 feet) above the finished floor level. In the CER,
depending on the C -CS requirements, a floor mounted main distribution frame (MDF)
might be required to support cable terminations.
G-3.2.3.10 Ground connections in the CER and TC must meet the appropriate NEC
requirements and practices. As a minimum, provide a single -point ground for all
communications-electronics equipment for the building within the CER. A copper
ground plate (bus bar with minimum 152 millimeters high by 610 millimeters in length [6
inches by 24 inches]) must be provided in the CER. Install the ground plate 2.1 meters
(7 feet) above ground level on a wall (preferably an outside wall) within the CER. The
ground riser must be a No. 1 or larger wire directly connected to the ground plate with
no taps. The resistance of the ground riser must be 5 ohms or less measured from the
main building ground point. All connections of wire-to-wire and/or wire-to-ground rod
must be cadwelded. As a minimum in the TC, provide a No. 6 ground wire or larger
connected with a direct home run to the ground plate in the CER. The grounding must
be 10 ohms or less measured at the gro unding point. Refer to ANSI/ TIA/EIA -607.
G-3.2.3.11 Environmental requirements are as follows. If a CER or TC will house
electronic equipment, the environmental limits are 5 C to 40 C (40 F to 104 F) and
20 percent to 70 percent non-condensing humidity. Normal operating ranges should be
10 C to 30 C (50 F to 86 F) with changes of not more than 12 C per hour, and 30
percent to 55 percent humidity.
G-3.2.4 Modular/Movable Equipment and Construction Items . Communications
and information systems wiring systems in areas with equipment or construction items
that can be easily moved, such as prewired workstations, systems furniture and
modular walls/offices, should provide sufficient flexibility and connectivity to enable
rearrangement without modifi cations to the permanent communications and information
systems wiring system in the facility. Suitable connectors must be provided; permanent
splices/connections must not be made. Communications and information systems
wiring in prewired workstations, p ortable walls and offices where the outlets are
integrally mounted or the wiring is permanently installed must be funded as a part of the
workstation, wall or office.
G-3.2.5 CSIR . Provide design drawings and records, which form the basis of cable
records, to the base CSIR ma nager, according to AFI 33-104 and AFI 21-404,
Developing and Maintaining Communications and Computer Systems Installation
G-5
Previous Page
