Page B—Foraging Around, Lancaster Farming, Saturday, April 18,1998
(Continued from Pag* i)
the flexibility (it is flexibility that
we should build into our systems) to
control his livestock under any and
all situations. Control comes form
the safe shock that the power fence
gives to the livestock and provides a
memorable experience that they do
not want to repeat very quickly!
Sapp spoke about he power of the
energizer, which he said is "the
heart" of the system, an compared it
to a tractor. He said that voltage of
a charger compares to RPMs of the
tractor engine and they are capable
of putting out the same RPM num
bers. However, the real power of the
tractor is measured by the horse
power output and the energizer's
power is measured in joules.
Joules is a measure of the power
shock of the energizer. With ade
quate joules the fence system does
not need physical strength, because
animals will not challenge it if they
have that memory of the shocking
power. A fencing system must be
adequately designed and construct
ed but the strength comes with the
energizer.
Sapp spoke about the carrying
capacity (voltage) of the fencing sys-
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tem, and he equated it to the carry
ing capacity of a watering system.
He made this analogy: small pump
and small pipes in a large system
mean little if any water, and the
same is true of the fencing system.
Large pump and small pipes mean
the ’ same, large pump and large
pipes in a large system mean plenty
of water, and the same holds tue for
the fencing system. If you use a
larger wire diameter (12.5 gauge)
and multiple wires for a perimeter
fence, it will provide you with ade
quate electrical charging capacity in
your fencing system.
Aluminum wire has a much lower
resistance and is much more con
ductive of current than is steel wire.
The energizer should be located as
close to the center of the system as
possible to allow for a better distrib
ution of current in the system, and
with properly located cutoffs, gives
you a lot of flexibility.
Sapp discussed in detail the
grounding system of the charger.
Without a grounding system, the
pulse would not complete the circuit
and would be completely ineffective,
this is also true for a poor grounding
system. The system works when
livestock touch the wire and the cur
rent fljjws through their body and
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With 12 5Lxl5 Tires
$1,750
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out their hooves into the ground and
completes the circuit through the
earth to the grounding system of the
charger. He stressed that the most
effective systems have the wires
positioned so that the livestock are
shocked in the face.
He recommended that a mini
mum of three galvanized steel
ground rods be installed six feet in
the ground and be spaced 10 feet
apart. The system needs to be test
ed for resistance with an ohmmeter
or a digital voltmeter to see if more
ground rods are necessary. A proce
dure to conduct this testing is pro
vided with most energizers; howev
er, if you need a copy of this proce
dure, I have it and will make it
available to you.
The other point he stressed was
that adequate protection from light
ning be provided because the
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grounding system of your energizer
will generally be better than that
which is provided by the primary or
secondary service on your electric
supply system. He provided some
practical ideas on this subject an
stated that some commercial prod
ucts only provide coverage for one
hit and then must be replaced. He
offered ideas that provide perma
nent protection and these can be
made by you or purchased, as new
products are available. I can give
you some information on this sub
ject if you need it.
His presentation offered many
practical solutions and advice on the
design and installation of an ener
gized fencing system. If you have
specific questions or need some
advice on fencing or energizers, give
me a call at my new phone number
(717)237-2221. Until next time,
happy grazing!
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