Buried cable installation
FiberPatrol FP1150 Product Guide
Page 61
Installing sensor cable in a buried vault
•
for below ground termination of fiber optic cable (buried end module): 10 m (33 ft.) service loop
•
for fiber splices: 10 m (33 ft.) service loop for each cable entering the splice enclosure
•
ensure that the minimum bend radius (dynamic and static) is not exceeded during or after
installation
Splice service loops
Service loops provide the extra sensor cable that is required when making fusion splices. A 10 m
(33 ft.) service loop is required for each section of sensor cable at all splice locations. A 10 m
service loop is comprised of 5 loops of cable with a 60 cm (2 ft.) diameter. Underground service
loops are installed inside buried vaults along with the splice enclosures. In the equipment room,
the service loops are usually attached to the back of the equipment rack.
FiberPatrol cable installation (pipeline TPI)
1.
Ensure that there is enough sensor cable at the head end location to reach the fiber
connection module in the equipment rack and to create a 10 m service loop inside the
equipment room.
2.
Backfill the trench over the pipeline to a level depth of 30 cm (1 ft.) above the pipe.
3.
Run the sensor 1 sensor cable to the designated start point of the detecting cable on the
pipeline.
4.
If the site plan calls for a splice at the designated start point, leave enough sensor cable to
create a 10 m service loop, and then continue deploying the cable.
5.
Lay the sensor cable so that it is centered directly above the pipeline.
6.
Continue to lay out the cable until reaching the designated splice point or endpoint.
Figure 71: Buried sensor cable splice recommendations
Figure 72 Service loop
splice enclosure
no strain on cable
at entry point
10 m service loop
10 m service loop
60 cm
(2 ft.)
splice point service loops
5 loops with 60 cm diameter = 10 m (33 ft.)
60 cm
(2 ft.)
