patura P30 Mode D'emploi page 29

minimum distance of 150 mm (6") from the vertical plane of the non-electrified wires. The
barbed wire and razor wire shall be earthed at regular intervals. For safety reasons we
recommend for offset fences only to use energisers with a maximum of 5 joules output
energy.
Follow our recommendations regarding earthing. See "Installing and testing an earth
system" on page 27.
A distance of at least 10 m (33') shall be maintained between the energiser earth stake
and any other earthing system connected parts such as the power supply system protec-
tive 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 fence wires shall not cross above overhead power or com-
munication lines.
Crossings with overhead power lines shall be avoided wherever possible. If such a cros-
sing 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 V
> 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.
Clearance
3 m (10')
4 m (13')
8 m (27')
- 29 -