An electric fence was primarily developed for the restriction of animal movement. Since then, the security used the initial technology and improved on it to give it a system using wires fitted on insulators and powered by an energizer capable of delivering a substantial and most uncomfortable shock.

The energizer is simply a transformer that can convert low power to a high volume power to the individual touching the wires. The energizer used for this purpose will not result in death, as the unit is designed to allow the power to pulsate on/off on a continuous basis. Therefore, unlike power in a residence, where electric shock could result in death, the electric fence power switches on and off momentarily and therefore is termed a non-lethal electric fence.

The professionally-made energizers conform to strict legislation and must comply with such governing bodies as the government, SABS, etc. This legislation has been introduced to prevent the public from being shocked to death. The maximum voltage allowed in South Africa is 10 000 volts and the average setting is between 7000 and 11 000 volts to allow for fluctuations.

Advantages of an electric fence:

• The visual protective appearance also acts as a psychological barrier
• The shock capacity
•  Warning alarm

Visual: When you install a good electric fence, the visual appearance itself will be a definite deterrent. For instance, if the house or property next door is not fitted with an electric fence, you are at a distinct advantage. The psychological aspect is that you feel safer once it has been installed.

Shock: when correctly wired and the right size energizer installed, the shock experienced will be of such a magnitude that it would deter a person from trying to enter the premises.

Alarm: It places a 24-hour monitor on the perimeter. If wired correctly, the electric fence will sound an alarm when the wire is cut or shorted. The electric fence will have served its purpose as an early warning device should this occur. Unlike most house burglar alarms, you will receive notification of an intruder at the boundary of the property.