Electric fence is one of the common perimeter security that gives an electric shocks to anyone who touches the fence. This metallic fence is insulated from the ground and an electric current runs through the fence. Anyone who touches the fence gets a shock and is repulsed. The voltage of shock varies from manufacturer to manufacturer. The better quality electric fences have progressive shocking voltage. The first time when someone touches the fence a low voltage shock is given as a warning. Within a specified time if again someone touches the fence then the shock of higher intensity is given, Such type of fence is good where the people might accidentally come in touch with the fence or there may be animals around the fence. The low voltage shock given initially does not cause any damage to the animal or human being. While installing electric fence it must be kept in mind that the fence is not easily accessible to the passer-by or the animals. Some of the electric fences are linked to a alarm so that every time someone touches the fence there is an audible alarm. The intelligent fences have built in counter and if the number of contacts with the fence increase the specified number in a given time interval, then only the alarm goes off. This helps in reducing the false alarms.


It may be noted that electric fence may be illegal in your area, so it is best to consult the local police before installing such systems.