the cables, and to provide extra cable for additional 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 ducts 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
**************************************************************************
NOTE: Aerial cable should be installed on existing
poles. Where this is not possible, requirements
must be shown on drawings.
**************************************************************************
Except as otherwise specified, aerial electrical work shall be installed as
specified in Section 16370A ELECTRICAL DISTRIBUTION SYSTEM, AERIAL and as
shown.
a.
A messenger cable system to support all aerial cable shall be
furnished. The messenger system shall be capable of withstanding
a minimum of 20 kN 4500 lbf of tension, including all
appurtenances, guys, and hardware.
b.
Transitions from aerial cable to underground cable shall be as
specified for CONNECTIONS BETWEEN MEDIUM-VOLTAGE AERIAL AND
UNDERGROUND SYSTEMS in Section 16370A ELECTRICAL DISTRIBUTION
SYSTEM, AERIAL.
c.
All splices in aerial cable shall be within 900 mm 3 feet of a
pole and placed inside a watertight enclosure. Drip loops shall
be formed at the cable entrance to the enclosure. Lashing clamps
shall be placed within 300 mm 12 inches of the enclosure.
d.
Lashing wire shall be wound tightly around both the communication
cable and the messenger cable by machine methods. The lashing
wire shall have a minimum of 900 mm 3 feet turns per linear meter
linear foot. Lashing clamps shall be placed at all poles and
splices.
SECTION 16790A
Page 13
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