JVA ELECTRIC FENCE SYSTEMS
38
a. The size of the warning plates shall be at least
100 mm × 200 mm.
b. The background colour of both sides of the
warning plate shall be yellow. The colour on the
plate shall be black and shall be either:
The substance of “Caution – ELECTRIC FENCE”.
c. The inscription shall be indelible, inscribed on both sides of the warning plate
and have a height of at least 25 mm.
Standard Requirements
Figure 7 – Warning
plate symbol
7. The energizer earth electrode shall penetrate the ground to a depth of at least 1
m.
8. 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.
9. Connecting leads that are run underground shall be run in a conduit of insulating
material or else insulated high voltage cable shall be used. Care shall be taken
to avoid damage to the connecting leads due to the effects of animal hooves or
tractor wheels sinking into the ground.
10. Connecting leads shall not be installed in the same conduit as the mains supply
wiring, communicating cables or data cables.
11. Connecting leads and electric fence wires shall not cross above overhead power
or communication lines.
12. 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.
13. If connecting leads and electric fence wires are installed near an overhead power
line, the clearances shall be not less than those shown in table.
Power line voltage V Clearance m
<=1 000 3
>1 000 <=33 000 4
>33 000 8
Minimum Clearances from Power Lines
14. If connecting leads and electric fence wires are installed near an overhead power
line, their height above the ground shall not exceed 2 m. This height applies
line on the ground surface, for a distance of
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