23
www.patura.com
tructed so as to ensure that these wires are positioned at a
minimum distance of 150 mm (6”) from the vertical plane
of the non-electrified wires. The barbed wire and razor wire
shall be earthed at regular intervals.
Follow our recommendations regarding earthing.
A distance of at least 10 m (33’) shall be maintained bet-
ween the energiser earth electrode and any other earthing
system connected parts such as the power supply system
protective earth or the telecommunication system earth.
Connecting leads that are run inside buildings shall be
effectively insulated from the earthed structural parts of
the building. This may be achieved by using insulated high
voltage cable.
Connecting leads that are run underground shall be run in
conduit of insulating material or else insulated high voltage
cable shall be used. Care must be taken to avoid damage to
the connecting leads due to the effects of animal hooves or
vehicle wheels sinking into the ground.
Connecting leads shall not be installed in the same conduit
as the mains supply wiring, communication cables or data
cables.
Connecting leads and electric animal fence wires shall not
cross above overhead power or communication lines.
Crossings with overhead power lines shall be avoided
wherever possible. If such a crossing cannot be avoided it
shall be made underneath the power line and as nearly as
possible at right angles to it.
If connecting leads and electric animal fence wires are
installed near an overhead power line, the clearances shall
not be less than those shown in the table below.
Minimum clearances from power lines for electric
animal fences
Power line voltage
Clearance
≤1000 V
3 m (10’)
>1000 V to ≤33,000 V
4 m (13’)
>33,000 V
8 m (27’)
If connecting leads and electric animal fence wires are
installed near an overhead power line, their height abo-
ve the ground shall not exceed 3 m (10’). This height
applies to either side of the orthogonal projection of
the outermost conductors of the power line on the
ground surface, for a distance of:
• 2 m (6’6”) for power lines operating at a
nominal voltage not exceeding 1000 V.
• 15 m (50’) for power lines operating at a
nominal voltage exceeding 1000 V.
Electric animal fences intended for deterring birds,
household pet containment or training animals such as
cows need only be supplied from low output energisers
to obtain satisfactory and safe performance.
In electric animal fences intended for deterring birds
from roosting on buildings, no electric fence wire shall
be connected to the energiser earth electrode.
A warning sign shall be fitted to every point where
persons may gain ready access to the conductors.
Where an electric animal fence crosses a public
pathway, a non-electrified gate shall be incorporated in
the electric animal fence at that point or a crossing by
means of stiles shall be provided. At any such crossing,
the adjacent electrified wires shall carry warning signs.
Any part of an electric animal fence that is installed
along a public road or pathway shall be identified at
frequent intervals by warning signs securely fastened to
the fence posts or firmly clamped to the fence wires.