Perimeter layout guidelines
FlexPS Product Guide
Page 15
Cable length calculator
Typically, a zone requires approximately 10% more cable than the linear zone length. The
following table provides a guideline for calculating the amount of sensor cable required for a zone
(in meters):
Fence height recommendations
The following cable spacing recommendations provide good security on well maintained fences.
However, depending on the security requirements and the fence condition, it is possible to use
alternate cable spacing. For example, on a high quality fence, in excellent condition, you could use
a single pass of cable to cover a 3 m (10 ft.) fence. However, to ensure the highest Pd, Senstar
recommends the following cable spacing (see
•
For standard fences up to 2.5 meters (8 ft.) tall - a single pass of MEX sensor cable at 1/2 the
fence height.
•
For standard fences greater than 2.5 m and less than 4.5 m (15 ft.) tall - a double pass of MEX
sensor cable at 1/3 and 2/3 the fence height.
•
For standard fences exceeding 4.5 m - three or more equally spaced passes of MEX sensor
cable. This depends on the fence fabric and structure, and on the site’s security requirements.
•
For vinyl coated fences up to 2.5 meters (8 ft.) tall - a double pass of Mark 2 sensor cable at
1/3 and 2/3 the fence height.
For higher vinyl coated fences, use double the recommended cable passes of Mark 2 cable for
standard chain-link of similar height.
•
For palisade fences that are less than 1.8 m (6 ft.) high, a single pass of Mark 2 cable along
the top rail.
•
For palisade fences that are greater than 1.8 m (6 ft.) high, use a dual pass of Mark 2 cable
along the top and middle rails.
Note
Senstar strongly recommends installing the sensor cables on the
secure side of the perimeter (the side of the fence opposite the
threat).
zone element
required cable length
start point
+ 1 m
service loops
+ 0.75 m X (linear zone length / 15)
corner and heavy gauge posts
+ 3.5 m X number of posts
cable terminations and splices
+ 0.5 m each
linear zone length
+ _ _ _ _ _ (zone length in meters)
required length of cable per pass
= _ _ _ _ _ (total length in meters)
total length X number of passes
= _ _ _ _ _ cable length (max. 300 m)
Note
The term standard refers to uncoated chain link, weld mesh, and
expanded metal fences. Painted fences are included in the standard
fence type, but the fence must be painted before the sensor cable is
attached. If a fence will be painted after the sensor cable is installed, the
cable must be removed while the fence is being painted, and then
reinstalled after the paint has completely dried.