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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
Clearance
≤ 1,000 V
3 m (10’)
> 1,000 ≤ 33,000 V 4 m (13’)
> 33,000 V
8 m (27’)
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 such crossing, the adjacent electri-
fied wires shall carry warning signs.
Any part of an electric 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”).
• 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 like the illustration to
the right or the substance of
“CAUTION: Electric fence”.
• The inscription shall be indelible,
inscribed on both sides of the
warn-ing sign and have a height
of at least 25 mm (1”).
Ensure that all mains-operated, ancillary equipment
connected to the electric fence circuit provides a degree
of isolation between the fence circuit and the supply
mains equivalent to that provided by the energiser.
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.
