MB1.5, MB3.0, MB4.5
9
JVA AgriRange Energizers
5.5 Earthing Your Energizer
The best way to earth an energizer is to use a minimum of 1.2 metre galvanized earth stakes.
if the earth stake is too rusty it will not work properly. The best place to locate the earth stake is
somewhere close to where the fence commences and if possible where the ground is damp such
as a garden bed, a water course, or the overflow from a rain water tank. (South African regulations
require a minimum of 3 earth stakes to be located close to the energizer.) do not connect the earth
of the energizer to a metal shed, metal pipes or utility earthing system as this could lead to shock
from tap, showers etc.
5.6 Semi-Permanent and Permanent Fences
The quickest and easiest way to set up a permanent fence is to use steel posts, but timber and
fiberglass posts can also be used. Make sure that the wires are tight enough to eliminate sagging.
2.5mm galvanized fence wire is recommended as poly tape or rope will degrade and break over
time. Warning signs need to be fitted as per the requirements outlined in the, General Requirements
for electric Fences section of this manual.
5.7 The Importance of Insulators
if the live wire is not well insulated the fence load will be much higher. This means that, for any
given length of fence, the voltage will be lower. Pieces of wood and garden hose are not good
insulators! For reliable results standard insulators designed for this purpose are recommended.
in a live-/earth-wire fence return system the earth wire(s) do not need to be insulated. in fact,
if using steel intermediates, the more times the earth wire touches a metal post the better it is
earthed/grounded.
UV stable poly insulators will last much longer than non-UV stable plastics. Plastic insulators are
not as susceptible to fracture as ceramic insulators. However, ceramic insulators are better in
grass, fire prone areas as they do not melt.
5.8 Maintenance
Maintaining permanent fences is important, especially during the warmer months when plant
growth is at its highest and after any disruptive weather events.
1. Check the fence voltage using an electric fence voltmeter. The JVA Fault Finder will also
detect faults and direct you towards them.
2. Keep vegetation away from the fence. if it touches the fence it will reduce its performance.
The judicious use of weed killer may be used if so wished to deter any growth.
3. Check that nothing has fallen against the fence and that the wires are not broken or have
been unclipped from insulators.
4. Check the condition of the earthing system for corrosion and loose joints.
5. Check that lightning diverters are all still operational.
6. Check and tighten any loose line clamps along the fence.
7. Check the energizer battery. If the energizer is flashing a low battery warning it is time to
recharge or replace the battery.
