messenger rated breaking strength. All messenger support and attachment
hardware and appurtenances shall be sized to exceed the rated breaking
strength of the messenger cable. Messenger cables shall be galvanized zinc
coated steel or aluminum clad steel.
PART 3
EXECUTION
3.1
INSTALLATION
System components and appurtenances shall be installed in accordance with
the manufacturer's instructions and as shown. All necessary
interconnections, services, and adjustments required for a complete and
operable DTS system shall be provided.
3.1.1
Enclosure Penetrations
Enclosure penetrations shall be from the bottom unless the system design
requires penetrations from other directions. Penetrations of interior
enclosures involving transitions of conduit from interior to exterior, and
all penetrations on exterior enclosures shall be sealed to preclude the
entry of water.
3.1.2
Interconnection of Video Equipment
Signal paths shall be connected between video equipment of 7.5 m 25 feet or
less with RG-59/U coaxial cable, and signal paths longer than 7.5 m 25 feet
with RG-11/U coaxial cable. Cables shall be as short as practicable for
each signal path without causing strain at the connectors. Rack mounted
equipment on slide mounts shall have cables of sufficient length to allow
full extension of the slide rails from the rack. Miniature coaxial cables
may be used for interconnection and jumpers between rack-mounted equipment
and equipment within enclosures.
3.1.3
Termination of Video Equipment
Terminators shall be installed on equipment as needed to properly terminate
the video signal so that it complies with EIA 170.
3.1.4
Interior Electrical Work
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NOTE: DTS cable should not be used for, or routed
through, Sensitive Compartmented Information
Facilities (SCIFs). The designer will not show any
DTS cable routed through a SCIF. The designer
should check DCID 1/21 for further direction.
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Except as otherwise specified, interior electrical work shall be installed
as specified in Section 16402 INTERIOR DISTRIBUTION SYSTEM and as shown.
3.1.5
Exterior Electrical Work, Underground
3.1.5.1
Underground
Except as otherwise specified, underground electrical work shall be
installed as specified in Section 16375A ELECTRICAL DISTRIBUTION
SYSTEM,UNDERGROUND and as shown.
SECTION 16794A
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