Connecting leads and electric fence wires shall not cross above overhead power or communication lines.
Any part of an electric fence which is installed along a public road or pathway shall be identified at frequent
intervals by prominently placed warning signs securely fastened to the fence posts or firmly clamped to the
fence wires. The size of the warning signs shall be at least 100mm x 200mm. The background colour of both
sides of the warning plate shall be yellow. The inscription on the plate shall be in black.
The warning sign shall typically appear as depicted in the figure below. The inscription shall be indelible,
inscribed on both sides of the warning plate, and have a height of at least 25mm.
Warning signs shall be placed at;
•
each gate
•
each access point
•
intervals not exceeding 10m
•
adjacent to each sign relating to chemical hazards for the information of emergency services.
Gates in electric fences shall be capable of being opened without the person receiving an electric shock.
Mains supply wiring shall not be installed in the same conduit as signaling leads associated with the electric
fence installation.
Where an electric fence passes below bare power line conductors, the highest metallic element shall be
effectively earthed for a distance of not less than 5m on either side of the crossing point.
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.
Power Line Voltage
Clearance
Equal or less than 1kV
3 meter
Greater than 1kV, but equal or less than 33kV
4 meter
Greater than 33kV
8 meter
If connecting leads and electric fence wires are installed near an overhead power line, their height above the
ground shall not exceed 3m.
This height applies 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 1kV
•
15m for power lines operating at a nominal voltage exceeding 1kV
AGRI
AGRI Solar
Appendix
19
