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Gallagher 3E1164 Power Fence Systems User Manual
Safety Requirements and Regulations
Use the following flow chart to determine if your fence is likely to be causing interference
on telephone lines.
Existing fence start
Proposed fence start
Are there loud clicks on the telephone lines
in the district that disappear when the
electric fence is turned off?
Are all sections of the fence and the
connecting leads over 100m away from the
telephone cables or lines?
Is the earthing system inadequate or within
10m of a power or telecommunications
earth, or structure of a building with mains
power in it?
Are all sections of the fence and its
connecting leads within 100m of the
telephone cables or lines at approximately
right angles to them (90 ± 10 degrees)?
Redesign or repair the fence to reduce the
loading or exposure, or increase the
separation from the telecommunications
cables or lines to reduce the interference.
Y- Improve or relocate the earth.
The fence is not
causing excessive
interference
The fence is unlikely
to cause excessive
interference
The fence is unlikely
to cause excessive
interference
N
Y
N
Y
N
Y
N
Figure 8.2
