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FiberPatrol components
Page 12
FiberPatrol Site Planning & Installation Guide
Cable ties
FiberPatrol sensor cable is attached to the fence with stainless steel cable ties. The stainless steel
cable ties provide long life and a high level of security. A cable tie tool is required to attach the
stainless steel ties to the fence. The stainless steel cable ties are available with bare metal or vinyl
coated in lengths of 8, 14, and 20 inches. For situations in which the FiberPatrol cable will be
installed on a temporary fence and will be redeployed later, UV resistant polyethylene cable ties
are recommended.
Sensitivity loops
Corner posts, terminal posts and heavy gauge tension posts generally have a dampening effect on
nearby fence vibrations. To compensate for this, use sensitivity loops at all corner posts, terminal
posts and heavy gauge tension posts on the fence. The sensitivity loops provide additional sensor
cable for areas that typically produce lower levels of fence noise (see
Service loops
Service loops provide extra sensor cable for making future repairs, and for making fusion splices.
A 10 m (33 ft.) service loop is recommended for every 300 m (984 ft.) of installed sensor cable. A
10 m service loop is also recommended on the hinged side of each gate that is protected by
sensor cable. In addition, a 10 m (33 ft.) splice point service loop is required for each section of
sensor cable at all splice enclosure locations. A 10 m service loop is typically comprised of 5
circular loops of cable with a 60 cm (2 ft.) diameter (see
).
Isolation loops
Isolation loops are optional, but are recommended for situations where a zone needs to be
isolated from adjacent zones (e.g., gate isolation). Isolation loops are also recommended as a
buffer between detecting sensor cable and software defined non-detecting cable. Fence-mounted
isolation loops use 14 in. steel cable ties to secure 7 loops of sensor cable to the fence. The 7
loops have a 60 cm (2 ft.) diameter, which requires approximately 13 m of sensor cable.
Figure 7: FiberPatrol sensor cable/non-detecting lead cable
cross section
color coded individual fiber
color coded 12 fiber buffer tube
PE filler unit (X 3)
central strength member
binder tape
ripcord
MDPE outer jacket
waterblock system
color coded 6 fiber buffer tube