EAP electric fencing

Electrify and Protect

Frequently asked Questions


What makes an energizer safe?

A correctly installed, legally compliant energizer puts a pulse of electricity onto a fence approximately once a second, every second. However, it is only ON for a very brief part of each second. The brevity of the pulse ensures that the shock administered is of such a brief duration that it cannot harm anyone touching a E.A.P..


What puts power onto the electric fence?

Electric fences are powered by energizers which are like a step up transformer that ups the power to 10000 volts onto the fence by means of HT cables linked onto the wires.

he energizers are deemed an appliance and are plugged into a 15amp wall socket.


What makes an energizer safe?

A correctly installed, legally compliant energizer puts a pulse of electricity onto a fence approximately once a second, every second. However, it is only ON for a very brief part of each second. The brevity of the pulse ensures that the shock administered is of such a brief duration that it cannot harm anyone touching a E.A.P..


Can electric fencing ever be lethal?

If one were to be trapped against an electric fence, by force or by accident, & receive repeated shocks over a period of time – this is likely to be lethal. However, there is no case on record anywhere in the world of a person being killed by merely touching an electric fence.


What if there is an Eskom power failure?

All security energizers are manufactured to include a battery for backup purposes. These energizers will typically continue to operate for anything from four to twenty hours on their batteries - depending on the make and model installed.


Are my pets (cats & dogs) safe?

YES! They may get close enough to touch the fence & get a shock but they soon learn not to go near the fence. Cats are particularly perceptive & tend to keep a distance! The only animals we know of to have died from a non-lethal fence is a snake and a tortoise. A snake is inclined to wrap itself tighter around the fencing poles after being shocked, whilst tortoises often do not back away sufficiently after a shock and repeatedly stick their heads out of their shells, receiving multiple shocks.


Will vegetation in contact with a fence damage the energizer?

No! The energizer will continue working, putting out its pulse each second, but the vegetation in contact may reduce the voltage appreciably, especially if soft & green, causing the pulse to flow to earth rather than remain on the fence. It is important to keep hedges or trees trimmed-back at all times away from the wires. A "ticking" (arcing) sound anywhere except near the energizer is a sure sign of something in contact with the fence or the insulation has broken down. The arcing distance between live and earth is greater in damp weather conditions.


Intruders could cut the wire?

YES. But, if the system were to be linked to an alarm, the monitor inside the energizer would detect a drop in voltage after a failure to detect a pulse after three or four seconds. This will trigger the alarm, aloud or silent (e.g. a flashing light, a siren or link to an armed response company- or all three!)


How good a deterrent is an electrified fence?

Excellent! The average intruder seems to have a great respect for electricity!! An electric fence is both a physical and psychological barrier


How important is earthing?

Very important! Touching a live strand only will not give an adequate shock to an intruder wearing thick rubber shoes - unless an earth strand or vegetation or a pole is touched at the same time. This will complete the circuit back to the energizer and cause a very unpleasant shock. This is why an installer will place earth spikes (rods) into the earth at the energizer and from the earthing wires on the fence into the ground.


I've got a pace-maker on my heart. Will an electrified fence kill me?

NO. There are no cases on record of anyone being killed or a pacemaker being damaged by a person touching a non-lethal electrified fence. Each pulse of current is for a very, very brief fraction of a second.)


Will the energizer interfere with TV or telephone reception?

Not normally. If it does, it is a sure sign that the fence has not been earthed properly.


Is the installation of a wall-top electric fence expensive?

It depends on the price one attaches to peace of mind. Electrified fences cost a small fraction of what it would cost to erect a solid fence or brick wall.


My existing wall is quite low. Could this be a problem?

It might be. The lowest electrified strand on a wall-top fence in an urban area, by international norms, (and subscribed to by the SABS now as well) is 1,5m above ground level. Your wall might need to be raised to this height first.


Are Warning Signs compulsory?

Yes! The spirit of the law is that no one should inadvertently come in contact with an electric fence. Warning signs need to be placed every 10m, on every gate and on any directional change of the fence. The international norm is black printing on a yellow background. The signage should say “electrified fence” and “danger” in three languages and there should be a meaningful picture of warning (eg. sparks) for those who cannot read. High voltage night lights are also available. These can be attached onto an electric fence, taking their power from the energizer and flashing brightly to alert would-be intruders that the premises are protected.


Please call us at E.A.P. should you have any other questions.
We will only be too happy to help.