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Fence designs
The effectiveness of
electric fencing depends on a number of factors: -
The normal flight reaction
of the species. The investigatory or neophobic responses of the species. The
animals ability to sense the fence or it's wires by vision, smell, or touch.
The capacity of the animal
to learn.
The tool using ability of
the species.
Once the responses of
animals are understood, electric fencing has tremendous flexibility .By
adjusting the number and height of the wires, by selecting the appropriate
spacing, by adjusting the current etc, one can achieve a specific design
that will meet the behavioural pattern of the species.
Whereas entire populations
of farm animals can be trained to respect electric fences, the control of
wildlife is more complicated, Here one has to deal with a mixture of
species, changing populations, a spread of ages, and changing sizes of the
animals to be controlled. As a rule of thumb set live wires at nose /
shoulder height to the species you wish to control. Fence creepers such as
zebra & sable can be effectively controlled with a wire at 250 to 300mm.
Power
fence design
For dry
areas where earthing is a problem


Jackal
fencing design

Wild pig
fence

Flood Gates
- River Crossing
Switches bottom wire off during high water.
A floodgate consists of a
horizontal chain, insulated at each end, strained across the river / stream
/ waterway. From this chain hang galvanised dropper chains. These are
attached to the horizontal chain at 150mm intervals for sheep, or 300mm
intervals for cattle. The chains hang 15mm above the average water level.
Power is fed into the
floodgate via a Floodgate controller. This devise reduces power flow to the
chains when they are submersed in water.
Should the water level be
expected to remain high for some time the cut-out switch should be switched
off thereby eliminating power loss.
Advantages
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1 |
Will prevent livestock crossing at low water levels. |
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2 |
Allows floating debris to float through. |
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3 |
Can be built to almost any size. |
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4 |
Will not drain excessive power from the fence when water rises. |
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5 |
Several can be run from one energizer. |
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6 |
Can be used used with electric or non-electric fencing. |
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7 |
A
large flood gate can justify it's own energizer. |
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