A live fence consists of metal wire with a voltage of 2 to 10 kV, but when touched, the voltage is low, about 30 volts, and therefore not lethal.
The stress fence was first described in 1889 by Mark Twain . The first to apply this fence in 1936 was the New Zealander William Bell Gallagher.
Farmers usually use such a fence to keep cattle so that they do not go beyond a certain plot. Often, barbed wire is also used with the fence to prevent the animal from jumping over the fence.
Material
At first, barbed metal wire was used for the fence, then it was replaced with a nylon thread with stainless steel.
Cattle Behavior
The cattle, after several electric shocks, realizes that it cannot go beyond the boundaries of the plot. After that, farmers often turn off the current. The most time for understanding is horses .
Fences to hold people
During the war, live fences were used in prisons and concentration camps to hold people. This prevented escape. At such fences the blow was fatal. In the First World War, along the Dutch-Belgian border, the German occupiers built a 300-kilometer under-voltage fence . And nowadays live fences are used in Russian prisons .