Table BB 1 - Minimum clearances from power lines for electrical animal fences
Power line voltage ( V )
Clearance ( m )
1000
3
> 1000
and
33000
4
> 33000
8
If
connecting leads
and
electric animal fence
wires are in-
stalled 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 ex-
ceeding 1000 V;
– 15 m for power lines operating at a nominal voltage exceed-
ing 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
electrical animal fences
intended for deterring birds from
roosting on buildings no fence wire shall be grounded if the
fence wires are not connected to metal parts. If one wire is con-
nected with a metal part ( i.e. a gutter) or a metal structure of
the building these metal parts must be grounded.
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 × 200 mm.
The background colour of both sides of
the warning sign shall be yellow. The in-
scription on the sign shall be black and
shall be either
– the symbol of Figure BB1, or
– the substance of
CAUTION: Electric 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 con-
nected 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.
NOTE 1 Ancillary equipment that complies with the require-
ments relating to isolation between the fence circuit and the
supply mains in Clauses 14, 16 and 29 of the standard for
the
electric fence energiser
is considered to provide an
adequate level of isolation.
Protection from the weather shall be provided for the an-
cillary 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.
PART 3: ELECTRIC SECURITY FENCES
For
Electric Security Fences
special hints are valid for the
mounting and installation – ask for Annex BB2 and CC of
EN 60335-2-76 with SECURA SECURITY.
of
an electric animal fence.
The supporting devices for the
electrified wires shall be constructed so as to ensure that these
wires are positioned at a minimum distance of 150 mm from the
vertical plane of the non-electrified wires. The barbed wire and
razor wire shall be earthed at regular intervals.
Observe the marked text on page 2 !
Follow the energizer manufacturer’s recommendations regard-
ing earthing.
A distance of at least 10 m shall be maintained between the
energiser earth electrode
and any other with the earthing sys-
tem 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 ca-
ble shall be used. Care must be taken to avoid damage to
the connecting leads due to the effects of animal hooves
or tractor wheels sinking into the ground.
Connecting leads
shall not be installed in the same con-
duit 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 Table BB1.