Perimeter Fence

ok, point well taken..

can u give me an idea of the DC system you were referring to in your post..

thanks..

In South Africa we couldn't do without electric fences to protect properties from thieves. It is spelled out nicely in the Occupational Health and Safety Act what energy and voltage levels and frequency of pulse allowed. As more people go hungry on this earth, so the frequency of theft will increase around the world.

Electric fences are most useful with an alarm system detecting the failure of HV. Like any other security system component, they are a deterrent, not the only solution to the problem. They should be arranged with earth lines near HV lines, so that HV shorts to earth in the event of someone throwing a rubber mat over the fence.

Also in South Africa (Durban) I am looking for something to deter maurauding monkeys - I understand that a condenser which sends out a pulse is the best way - it gives a shock but is not lethal. Possibly a coil from a car would be the answer but I would like to have an idea of the tech specs for such an set-up.

One of your local security shops should be able to help you with a HV (High Voltage) fence energiser, which conforms to OHSAct. This should do the trick, monkeys are smart, they should learn quite quickly.

In my area elctric or electro fence of 10KV DC Pulse is common.

Like you rightly said, Electric fences are most useful with an alarm system detecting the failure of HV.

To Maerskbhoy,

We use not only the electro fence but also flexi guard (a sensor in form of single core cable attached to perimeter wall to detect hard impact on the wall)

Both units come with alarm system which are arranged such that any form of intrusion or fault in the system is detected via the alarm system. These form an integrated intrution detection and prevention system.We use a very good system called Megasys from Advanced Perimeter Systems limited.

In addition, cctv systems are installed with speed dome cameras at strategic points in the premises to complete what we call enterprise integerated security system with dedicated personnel to monitor activities from a control room.

Have a look at this www.aps-perimeter-security.com/megasys.htm

Cheers,

ethobil

Guard dogs? Make sure they know (and are friendly with) your guards and anyone else who will come into contact with them, although I suppose their main use will be to be noisy rather than dangerous.

Do you have CCTV around your warehouse?

With some simple cameras you can use video analysis programs that can help. For example this one. Truly amazing system. They just presented it last week at our company. You just plug in your cameras and it works.

I wonder if an alarm system wouldn't be more effective? You have guards, if they got alarms upon perimeter penetration, they could respond better. And a loud enough bell would send most intruders off into the tall grass to avoid capture anyway. Just make sure the guards don't get complacent. If there's an alarm that isn't responded to, the thieves will take note...

Due respect to the responders that have an actual need for electrified fencing, but it seems to me you could start off with a simpler, less potentially lethal means. CCTV may work wonders, but if you only have a few 300W lamps, they would be little more than motion detectors, and might not be as effective as a low-power, but very loud bell would be.

I am kind of an old guy but years ago took a tour at FBI headquarters. They told us that the only sucure system was a man with a dog, and his rounds had to be designed to pass each point at least once every three minutes...

You might consider a coil of razor wire http://www.razorribbon.com/index.php in conjunction with the barbed wire.

I have heard of geese being used as guard animals/alarm system. They are cheap (cheep), effective and tasty if they don't work.

OK, "big bird", obviously a plug for your (tasty) cousins - but Guinea fowl are probably more reliable than even geese...

I recently was ripped of my wallet and cards from my garage by punks.

What I am doing, which should work, is installing a motion detector alarm (loud) and a DVR recorder with motion detector (only records with motion) to a SIM card. Video (color and with IR low light level) should work, should there be a next time.

Maybe something like this would work for you? There are 4, 6, 8, and more cameras with DVR systems available.

I would also NOT recommend HV fence techniques or the like. Liability issue. Thieves can be sort of safe too (or their survivors). Been tested and proven here in the US many times. 'Tis a shame tho.