19
The indicated values refer to a single or multiple strand fence without load. For the kilometre values in
columns 2 and 3 for example 20-40 km the lower km values are applicable for fencers with lower joule
values, the higher km values are applicable for fencers with higher joule values.
The intermediate resistance values in column 1 eg 0.4
Ω
– 4
Ω
per metre have the corresponding interme-
diate km values. For example 1
Ω
per metre gives approximately 12 km (which is an intermediate value
between 7 and 17 km taken from column 2 for a powerful mains fencer).
If vegetation growth is expected on the fence line the fence length indicated above will be reduced to the
following percentage values:
For medium vegetation growth: to approximately 50% of the fence length without vegetation growth.
For heavy vegetation growth:
to approximately 20% of the fence length without vegetation growth.
In case of vegetation growth a very good grounding is all-important !
Fence lengths in relation to fence resistance
(for minimum voltage of 2000V at the end of the line)
value of
conductivity for
fencing materials
mains and
battery operated
greater than 1 joule
dry battery
fencers
0,05
Ω
/m
20-40 km
5-10 km
0,4
Ω
/m
8-17 km
3,5-5 km
4
Ω
/m
3,5-7 km
1,5-3 km
15
Ω
/m
1,5-2,5 km
0,5-1 km
Connection cable fence
Special fence connection clamps are recommended in
case of polywire or tape.
Fence posts
All materials can be used for fence posts in connec-
tion with adequate insulators. Especially suitable are
wooden and plastic posts. Metalposts can very easily
short the fence voltage to ground in case of brittled
insulators and high peak voltages. The distance bet-
ween the posts can vary between 4 - 10 m, depen-
ding on the wire weight. Parts of the electric fence
intended to be handled must be insulated, e.g. gate
handle. Fence wires and connecting leads shall not
be in contact with metal parts not belonging to the
electric fence such as railings of a bridge. Fence wires
and connecting leads shall not be fixed to poles used
for low-voltage, high-voltage, telephone or telegraph
lines. When installing electric fences the national safe-
ty regulations must be respected.
How to avoid radio interference
Faulty connections on the fence can cause radio and
TV interferences. Knot connections and wires loosely
put onto each other are critical as the supplied voltage
causes sparks. This may occur especially with poly
wire and polytape. The horizont tape connector is an
adequate mean to avoid sparks. Control: walk along
the fence with a radio - faulty connections cause crack
sounds. In the darkness sparks become visible.
Fence installation
Fence wires and connecting leads shall be adequat-
ely supported on insulators of electrially and mecha-
nically reliable material. Insulators must be placed in
such a manner that fence wires and connecting leads
maintain a distance of at least 3 cm to structural parts,
pipes, wires and comparable parts. Connecting leads
to electric fences for domestic and wild animals shall
not be laid into or through buildings or places where
there is a risk of fire (barns, stables etc.).
PART 8:
MAINTAINING NORMAL OPERATING
CONdITIONS
As an animal owner specialized in pasture keeping or
an operator in protection of wild animals you should
not underestimate the duty of care.
The following checks must be carried out:
Testing the controller according to the manual espe-
cially the output voltage (daily).
Some horizont controllers have incorporated testing
devices for the fence voltage indicated by single or
LED bars. This device is capable to recognize fence
faults at the controller, e.g. fallen down fence. It is very
important to measure the fence voltage at the “end of
the fence” for example with the digital-voltmeter or the
horizont voltage tester.
