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Important Information
vertical plane of the non-electrified wires. The barbed wire and razor wire shall be earthed at regular
intervals.
•
Follow the energizer manufacturer's recommendations regarding earthing.
•
The energizer earth electrode should penetrate the ground to a depth of at least 1 m (3 ft) and not be
within 10 m (33 ft) of any power, telecommunications or other system.
•
Use high voltage lead-out cable in buildings to effectively insulate from the earthed structural parts
of the building and where soil could corrode exposed galvanized wire. Do not use household electrical
cable.
•
Connecting leads that are run underground shall be run in conduit of insulating material or else insulated
high voltage lead-out cable shall be used. Care must be taken to avoid damage to the connecting leads
due to the effects of animal hooves or tractor 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 following.
Minimum clearances from power lines for electric animal fences
Less than or equal to 1 000
Greater than 1 000 and less than or equal to 33 000
Greater than 33 000
•
If connecting leads and electric animal fence wires are installed near an overhead power line, their height
above the ground shall not exceed 3 m
This height applies either side of the orthogonal projection of the outermost conductors of the power
line on the ground surface, for a distance of:
-
2 m for power lines operating at a nominal voltage not exceeding 1 000 V;
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15 m for power lines operating at a nominal voltage exceeding 1 000 V.
•
Electric animal fences intended for deterring birds, household pet containment or training animals such
as cows need only be supplied from low output energizers 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 energizer 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
by electric fence warning signs (G6020) at regular intervals that
are securely fastened to the fence posts or firmly clamped to the
fence wires.
•
The size of the warning sign shall be at least 100mm x 200mm.
•
The background colour of both sides of the warning sign shall
be yellow. The inscription on the sign shall be black and shall be
either:
-
the substance of "CAUTION: Electric Fence" or,
-
the symbol shown:
•
The inscription shall be indelible, inscribed on both sides of the
warning sign and have a height of at least 25mm.
•
Ensure that all mains operated, ancillary equipment connected to the electric animal fence circuit
provides a degree of isolation between the fence circuit and the supply mains equivalent to that provided
by the energizer.
•
Protection from the weather shall be provided for the ancillary equipment unless this equipment is
certified by the manufacturer as being suitable for use outdoors, and is of a type with a minimum degree
of protection IPX4.
6
Power line Voltage V
Clearance m
3
4
8
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