Tru-Test AN90 Manual Del Usuario página 7

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
1000 V
1000 V to 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 (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 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
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 100x200 mm (4x8").
Clearance
3 m (10')
4 m (13')
8 m (27')