WARNING!

We suggest the common high voltage fence design described below NOT to be used in any security application!

All high voltage security fences are NOT EQUAL, in fact, far from it. Many of the high voltage fences as shown below that are used for security look good but are anything but.

All the fences that are used for perimeter security applications are almost always built in sections where the high voltage is fed into a single wire that can fold back forth several times a any given section and verified the existence of and also verify the actual voltage at the far end of a given section of fencing.

It is a standard practice to interconnect several sections together to complete your perimeter. This also helps to locate any “opens” and/or “shorts” that would interfere with the operation of the fence.

Note that an alarm is given when to input fence voltage is interrupted somewhere between there and the far in of all the interconnected sections and the voltage monitor at the far end of the combined sections.

Here is where the similarities end. We have seen various high voltage security fence inter- connected designs that make the security fence essentially worthless.

What “Not To Do” when construction your electric fence.

Consider the following common fence design which accounts for many of the security fences in the field. From a security viewpoint, it is a “feel good only” piece of crap. It is cheap, easy to install, and hardly ever gives a false alarm, but from a security standpoint it is essentially worthless.

To check the voltage on the wires of any high voltage fence, purchase a high voltage electric fence meter which is easily obtained at Home Depot, Lowes, Kencove and any number of farm equipment supply stores for540 or 550. These meters are design specifically to measure the actual fence voltage.

Using your fence voltage meter, one can easily determine which wires carry the fence voltage and which wires are grounded. None of the grounded wires will provide any voltage or shock when touched.

The supposed object of a high voltage security fence is to deter intruders and actually guard the interior. We have found many high voltage fences around the country that were not installed for security, nor designed for security. These high voltage fences were specifically designed for     the absolute minimum of   and lowest  cheapest installed cost to give the illusion of security.     

The top wire on your high voltage fence should definitely be grounded and not floating as shown above in the diagram for obvious reasons.

 The high voltage fence that is shown above is used for security all over the U.S. and any intruder can simply set up and walk in and out without getting his clothes dirty:

Do NOT use this design for perimeter security where all the wires carry high voltage because:

 (1:) an intruder can simply lay down a foam mattress or a sheet of rubber over the top wire and simply go over the fence. If the top wire is not connected to anything or not grounded, then it simply has no viable function

 (2: ) an intruder can simply cut through, or spread  the fence wires, when all the wires are interconnected and at the same voltage one has to work to get shocked.

 (3:) The 3 bottom wires are all grounded and easily put out of the way. This is NOT security, but will surely reduce alarms. Just push the bottom wires into the ground and out of the way for easy access. A skinny guy can just crawl under.

Fortunately the fence wires are not color-coded as the sketches are …