patura P20 Mode D'emploi page 40

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, com-
munication cables or data cables.
Connecting leads and electric fence wires shall not cross above overhead power or communi-
cation 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 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 fences
Power line voltage
> 1.000 ≤ 33.000 V
> 33.000 V
If connecting leads and electric 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 (7') for power lines operating at a nominal voltage not exceeding 1.000 V.
• 15 m (50') for power lines operating at a nominal voltage exceeding 1.000 V.
Energisers connected to electric fences shall not be installed in buildings with fire risk like
barns, storage sheds or stables. To prevent lightning damages you have to install lightning
protection (spark gap with earthing) in the leadout cable before you run it inside the building.
Electric 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 fences intended for deterring birds from roosting on buildings, no electric fence wire
shall be connected to the energiser earth stake. A warning sign shall be fitted to every point
where persons may gain ready access to the conductors.
Where an electric fence crosses a public pathway, a non-electrified gate shall be incorporated
in the electric fence at that point or a crossing by means of stiles shall be provided. At any
≤ 1.000 V
Clearance
3 m (10')
4 m (13')
8 m (27')
- 40 -