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 Table BB1.
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.
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 exceeding 1000 V;
– 15 m 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 electrical animal fences intended for deterring birds from roosting on buildings no fence wire shall be ground-
ed if the fence wires are not connected to metal parts. If one wire is connected 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
Table BB 1 - Minimum clearances from power lines for electrical animal fences
Power line voltage ( V )
> 1000 and
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 inscription 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 connected 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 requirements 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 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.
1000
33000
> 33000
Clearance ( m )
3
4
8
9