9
*
Crossings with overhead power lines should be avoided wherever possible. If
such a crossing cannot be avoided it must 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 3.
Minimum Clearances From Power Lines for Electric Animal Fences
Power Line Voltage (V)
Clearance (m)
Less than 1,000
3
Between 1,000 and 33,000
4
More than 33,000
8
*
If connecting leads and electric animal fence wires are installed near an
overhead power line, their height above ground shall not exceed 3m.
*
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:
*
2m for power lines operating at a nominal voltage not exceeding
1000V (1 kV);
*
15m for power lines operating at a nominal voltage exceeding
1000V.
Orthogonal Projection
Fence
Power Line
*
In electric animal fences intended for deterring birds from roosting on
buildings, no electric fence wire shall be connected to the energiser earth
electrode. A warning sign shall be fi tted to every point where persons may gain
ready access to the Conductors.
*
Where an electric animal fence crosses a public pathway, a non-electri-
fi ed 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 electrifi ed wires shall carry warning signs.
*
Any part of an electric animal fence that is installed along a public road or
pathway shall be identifi ed at frequent intervals by warning signs securely
fastened to the fence posts or fi rmly clamped to the fence wires.