e. Splices shall be installed in cable boxes. A cable length of at
least 1 m 3 ft shall be provided in each splicing location for future
cable relocation, splicing, and re-racking. All splice enclosures
(manholes, handholes, above-ground pedestals, etc.) shall have a
length, width, and depth of at least twice (2X) the initial size
requirement ot accommodate future system work (i.e., splices). All
cable ends shall be protected at all times with end caps except during
actual splicing. During the splicing operations, means shall be
provided to protect the unspliced portions of the cable from the
intrusion of moisture and other foreign matter.
f. For cable installed in duct and conduit, a cable feeder guide shall
be used between the cable reel and the face of the duct and conduit to
protect the cable and guide it into the duct and conduit as it is
played off the reel. As the cable is played off the reel, it shall be
carefully inspected for jacket defects. Precautions shall be taken
during installation to prevent the cable from being "kinked" or
"crushed." A pulling eye shall be attached to the cable and used to
pull the cable through the duct and conduit system. Cable shall be
hand fed and guided through each manhole. As the cable is played off
the reel into the cable feeder guide, it shall be sufficiently
lubricated with a type of lubricant recommended by the cable
manufacturer. Where the cable is pulled through a manhole, additional
lubricant shall be applied at all intermediate manholes. Dynamometers
or load-cell instruments shall be used to ensure that the pulling line
tension does not exceed the installation tension value specified by the
cable manufacturer. The mechanical stress placed upon a cable during
installation shall be such that the cable is not twisted or stretched.
3.1.3.2
Aerial Cables
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NOTE: Aerial cable should be installed on existing
poles where height, clearance requirements, and
structure loading allow addition of cables. Where
this is not possible, requirements for new poles
must be shown on drawings. Installations will comply
with ANSI C2 and NFPA 70.
Common lashing machines provide 1 turn per 380
linear mm (15 linear inches) in a single pass, which
is acceptable for locations where loading due to
weather conditions is moderate. Other locations may
require multiple passes with the lashing machine.
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Except as otherwise specified or shown, aerial communications work shall be
installed as specified in Section 16370A ELECTRICAL DISTRIBUTION SYSTEM,
AERIAL.
a. Messanger cable System
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NOTE: The designer will verify local electrical
installation requirements to determine if new
grounding conductors and electrodes are required at
each messenger cable ground connection and will
select the first, or second, or both bracketed
entries as determined to be necessary.
SECTION 16792A
Page 16
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