Tru-Test speedrite Delta Mains Manuel D'instructions page 8

between the energizer 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
≤1,000 V
>1,000 ≤33,000 V
>33,000 V
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 1,000 V.
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.
6
Clearance
3 m
4 m
8 m
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 at
frequent intervals by warning signs securely fastened to
the fence posts or firmly clamped to the fence wires.
The size of the warning sign shall be at least
∆
100 x 200 mm.
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:
or the substance of "CAUTION: Electric animal
fence".
The inscription shall be indelible, inscribed on both
∆
sides of the warning sign and have a height of at
least 25 mm.
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.
Requirements for electric security fences
Electric security fences and their ancillary equipment
shall be installed, operated and maintained in a manner
that minimises danger to persons, and reduces the risk
of persons receiving an electric shock unless they
attempt to penetrate the physical barrier, or are in the
secure area without authority.
Electric security fence constructions that are likely to
lead to the entanglement of persons shall be avoided.