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 MIL-HDBK-1012/3
Change 1, 30 November 1996
multimode fiber optic cable should be installed in the conduit for
network connectivity and redundant routing. Figure 12 depicts a
typical telecommunications closet.
1.6.1
Telecommunications Closet Requirements. The closet shall
be sized in accordance with EIA/TIA 569, Table 7.2-1 which will
result in a room ranging in size from 7 sq. m to 11 sq. m (70 sq. ft.
to 110 sq. ft.). Refer to Example Four.
a) The ceiling should be a minimum of 2.6 m (8.5 ft.) high
with no false ceiling.
b)
Doors shall be a minimum of 1 m (3 ft.) wide and open
outward.
c) A 1 m (3 ft.) clearance shall be maintained in front of
cross connects and equipment racks.
d) A minimum of two dedicated 20 ampere 110 volt ac duplex
receptacles shall be provided for equipment rack power, preferably
served from the UPS power panel. Additionally, duplex convenience
outlets shall be spaced at 2 m (6 ft.) intervals around the perimeter
walls. Sleeves, slots, and wall penetrations shall penetrate the
room 27 mm to 78 mm (1 to 3 in.) and shall be properly firestopped.
e)
HVAC shall be provided on a 24-hour basis.
f) A 41 mm (1-1/2 in.) conduit shall be provided from the
equipment room to the building grounding electrode. Closets shall be
connected to a single point ground. In accordance with EIA/TIA 607,
Commercial Building Grounding and Bonding Requirements for
Telecommunications.
g) Lighting shall be a minimum of 540 lux (50 footcandles)
at 1 m (3 ft.) AFF.
h) A minimum of two walls shall be covered with 21 mm (3/4
in.) fire rated, void free plywood. The plywood shall be painted
with two coats of light colored fire retardant paint.
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