16
SAFETY HINTS
General hints for the installation and operation
ANNEX BB.1REQUIREMENTS FOR ELECTRIC ANIMAL
FENCES Electric animal fences and their ancillary equip-
ment shall be installed, operated and maintained in a
manner that minimises danger to persons, animals or
their surroundings. Electric animal fence constructions
that are likely to lead to the entanglement of animals or
persons shall be avoided. An electric animal fence shall
not be supplied from two separate energisers or from
independent fence circuits of the same energiser. For any
two separate electric animal fences, each sup-plied from
a separate energiser independently timed, the distance
between the wires of the two electric animal fences shall
be at least 2,5 m. If this gap is to be closed, this shall be
effected by means of electrically non conductive material
or an isolated metal barrier.Barbed wire or razor wire shall
not be electrified by an energiser. A non-electrified fence
incorporating barbed wire or razor wire may be used to
support one or more off-set electrified wires of an electric
animal fence. The supporting devices for the electrified
wires shall be constructed so as to ensure that these wires
are positioned at a minimum distance of 150 mm from the
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.A distance of at least 10 m shall be
maintained between the energiser earth electrode and any
other with the earthing system connected parts such as the
power supply system protective earth or the telecommuni-
cation 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 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 Table BB1.
Table BB 1 - Minimum clearances from power lines for
electrical animal fences
Power line voltage (V)
Clearance ( m )
≤
1000
3
> 1000 og
≤
33000
4
> 33000
8
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 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 for power lines operating at a nominal
voltage not exceeding 1000 V;– 15 m for power lines
operating at a nominal voltage exceeding 1000 VElectric
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 electrical animal fences intended
for deterring birds from roosting on buildings no fence wire
shall be grounded if the fence wires are not connected to
metal parts. If one wire is connected with a metal part ( i.e.
a gutter) or a metal structure of the building these metal
parts must be grounded.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 ad-
jacent 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.
Ensure that all mains-operated, ancillary equipment con-
nected to the electric animal fence circuit provides a de-
gree of isolation between the fence circuit and the supply
mains equivalent to that provided by the energizer.
ENGLISH
