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Electric Fencing

 

Mega T

 

 Electric Fencing          

  AFW Lisse Electric Fencing & Security

Making mistakes with electric fencing installations

Poor earth grounding. This is were the electric fence gets it strength from.  A Minimum of 3 ground rods that is 1 meter long should be used and the first rod should be as close as possible to the Energizer and the 2^nd as far as possible.  And there after every 50 meters of fence should have a rod added. Does not matter how many strands of wire is being used,  5 lines or 24 lines.

It is always best to use copper rods and put them in a place were there is lots of ground water, for example in the garden next to flowers that will be watered on a weekly basis will help ground your system better.  You can even water the ground rods in winter when there is less rain.  A other way of measuring how many ground rods you need is to look at your Energizers Joule capacity,  One rod per joule should work well if you chose the correct energizer for the size fence you have.

Using different types of materials when you join wires. Don't do it. When you hook up steel wire to copper electrolysis happens and the metal becomes corroded, making a poor contact and weakening shocking power. 

Inadequate animal training. Each and every animal must learn that the fence hurts. So please build a handy training fence, preferably on heavy wet soil. Flag the fence for visibility, If you have purchased a good energizer you can also drop down the voltage for the first few days until the animals learned how the electric fencing works and increase the voltage later again.

Fence posts too close together.  Well this is up to you but electric fencing with bigger spacing between posts will act like a rubber band and allow the animal to run into the electric fence without braking the wire and pensioners.  But if you have the post to close to each other it will be more like a wall and something will break.  If you have a fence for mainly security reasons it will be better to have the electric fence post closer to each other (3 to 5 meters apart) but if you need to keep animals in or out of the camp the post should be 5 to 8 meters apart to prevent damage to the electric fence.  

Too many Joints.  Try and make the least amount of joints because the electric fence is as week as its weakest joint.  And make sure every joint is a proper contact joint.  (Crimp it very well, rather crimp it an extra time than having a weak joint.) 

Proper Clearance.  Make sure there is not an old fence or plants that will touch your electric fence in the future and that the wind can not blow something conductive against your electric fence that will give you faults alarms and voltage drops. Or one of the positive wires in contact with the ground or plants or grass.

Poor-quality material  Be careful here. Sunlight deteriorates plastic. So buy good-quality, long-lasting material. Make sure that your material you use is resistant to degradation by ultraviolet light.

Solar panels not directly facing the sun. This seems almost too obvious to be a problem. But a solar panel won't function at its potential if not properly installed. For the best result you must know were your optimum position is for each season.  If you do not have an adjustable solar panel, adjust it for optimal performance in the winter sun. There is solar calculators on the web like this one http://solarelectricityhandbook.com/solar-angle-calculator.html

Johannesburg
Optimum Tilt of Solar Panels by Month

Figures shown in degrees from vertical

Kinks in high-tensile wire. A small kink in stiff wire will always break. Any damage in the wire causing a break. Always cut out a damaged section of high tensile wire and splice it. Incidentally, I have found that a hand-tied square knot makes the strongest splice.

Wires too close to each other. Keep them at least 10 cm apart. 

Wire too Thin. The Thicker the wire, the more electricity it will carry. Don't skimp. 

Voltmeter. Without a voltage meter to check how hot a fence is, you're just guessing. And you will spend hours trying to find a fault.

Inadequate Energizer. A wimpy electric fence energizer  gives you a weak fence. Don't skimp here because animals will think a smooth wire fence is a joke without a strong bite, and they'll walk right through it. 

 Correct Wire vs. Energizer.  Cheap wire can have a great conductivity but will only last 2 year.  But for a few rand more Galvanized wire will last 5 to 7 years, and it will conduct electricity as far as plain wire.   Stainless steel wire will last 15 to 20 years but will only conduct electricity for a short distance.   For example a 3 joule energizer will be able to manage a electric fence of 5 to 8 kilometers with cheap wire but good conductive wire that is 1.2mm thick,  but Stainless steel  1.2mm thick wire will only be able to do an distance of 1kilometer.  But then you can use aluminium wire of 1.2 mm thick and it should reach a distance of 10 to 12 kilo meters and last up to 20 years.  Very important to match your Energizer with the correct electric fencing wire. 

Keep the electric fence clear from vegetation

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Questions About Electric Fencing

1 Will it hurt my children?

No, the pulse is intermittent. Should a child or adult touch the fence the immediate reaction is to pull away after initial shock.

2 How good a good deterrent is an electric fence?

Electric fencing is an excellent deterrent visually and from a fear factor. It is designed to keep unwanted people outside. Should it be cut or tampered with the alarm will sound.

3 Do criminals place something like a blanket or rubber mat on the electric fence to climb over it?

Due to the fence design using springs the wire will be shorted out when touching under pressure and trigger the alarm.

4 Is it necessary to connect the electrified fence to the Alarm monitoring company?

There is a definite advantage in doing so.

5 Will it hurt my cat or dog?

Cats are perceptive to the aura of the electricity in the fence. Cats can smell the magnetic field and would not normally approach the electric fence. Dogs will not normally touch a second time and but they will not die should they do so or have any damage to them selves from the electric fence..

6 What would happen if the wires were cut?

It is difficult to cut the electric fencing wire without been shocked. Should this happen the fence will immediately sound the alarm.

7 What sort of voltage is in the fence?

The maximum voltage allowed by law is 10,000 volts and the average setting is between 8000 and 9500 volts to allow for legal tolerance.

8 Will my monthly electricity account increase dramatically?

No, an energizer uses very little power - about the same as your alarm system draws.

9 What happens during a power failure?

The good energizers have a 6-8 hour battery backup and will keep the fence electrified to full power. The energisers are normally set between 7,000 and 11,000 volts.

10 Do branches and foliage have an effect on the fence?

It is best to keep foliage and branches trimmed back as too much foliage drains the power from the fence to earth.

11 Do I only switch on the fence when I go out, or at night time?

No - always keep your Live Wire Electrified Fence on day and night. It is there to keep out intruders every day of the year.

Please call us should you have any other questions. We will only be too glad to help.

• We specialises in the design, supply and installation of electric fencing and security fencing products.

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Druid 13 LCD, 15 LCD Electric Fencing unit

The Druid 13 and 15 offer 3.0 J and 4.6 J output energy and even though they belong to the Druid 2 range, these products offer many more benefits.  Using the Adaptive Power Technology (APT), pioneered and patented by Nemtek, these two energizers offer a new and unique method in detecting how much power a electric fence can accept and handle before it starts to arc and waste energy, thus maximizing the power on the electric fence.  Changes in the surrounding environment can affect a electric fence�s efficiency. The APT actively analyses the electric fence and adapts the transfer of power as required to ensure maximum performance. These Nemtek energizers are an excellent choice for coastal areas, where the salt build-up during the dry season can result in increased power losses along the electric fence. The APT feature will modify the output pulse to maximize the transfer of power onto the electric fence and minimize arcing. The energizer ensures that the electric fence only receives the amount of power it can manage thus making it energy efficient and economical.  Features    • LCD display shows information which is quick and easy to read • The background colours of the LCD display, give a quick glance indication of the energizer status without the user having to approach the unit in order to read the display. For example �green� indicates all is fine, �orange� indicates that attention is required and �red� indicates an alarm condition. The coloured lights are visible from a distance, and are quick to spot • The Druid LCD range can accept up to two keypads to remotely control the energizer • Quick walk test mode on the system offers the installer a quick test facility to walk the electric fence and test it • High voltage monitor will alarm when the live wires are tampered with • Earth wire monitor alarms when there is tampering with the earth wires • Easy to use tag switch for controlling the unit if the keypad option is not used • Connectable to an armed response radio • Gate monitor input monitors the position of the gate to indicate if the gate is open • Lightning and power surge suppression built in to reduce the possibility of damage due to power surges • Internal battery backup system in case of power failure • Intelligent power saving to extend the battery life and save energy

Wizord 4 Electric Fencing unit

The Wizord 4 is the logical choice for domestic and light industrial installations where a medium powered energizer is required.  This generation of energizers has been field tested for many years and boasts unsurpassed reliability. Simple to install and easy to maintain.  Features    • High voltage monitor will alarm when the live wires are tampered with • Earth wire monitor will alarm when the earth wires are tampered with • Easy to use tag switch for controlling the unit • Can be upgraded to a Merlin 4 energizer • Connectable to an armed response radio • Gate monitor input monitors the position of the gate to indicate if the gate is open • Lightning and power surge suppression built in to reduce the possibility of damage due to power surges • Battery backup system in case of power failure • Intelligent power saving to extend the battery life and save energy • Siren and strobe outputs to indicate electric fence condition

Merlin 4 Electric Fencing unit

The Merlin 4 offers what the Wizord 4 has in terms of features, but with remote control through a dedicated keypad. The keypad also allows the user and the installer to program and control the energizer from a remote location. This allows the energizer to be installed near the electric fence and the keypad to be located where it is most convenient for the user. Additional features that the standard Wizord does not have, can be enabled through the keypad.  Features    • Siren trigger times and frequency can be adjusted as required • Voltage outputs can be controlled to reduce or increase the output energy as required by the user • High and low voltage modes to change the power output of the energizers and yet keep the alarming capability intact • Gate chime to notify if the gate has been opened and closed • Bypass options for the siren, strobe and gate as required • Siren times can be programmed to suit the different needs of the user

Merlin Stealth M15S, M18S, M25S, M28S Electric Fencing unit The Nemtek Merlin Stealth is a powerful range of energizers, that can be used as simple high end security energizers, but can also be programmed to offer a customised solution. The Merlin Stealth range is ideal for higher security requirements and can be networked if required. There are:   • Single zoned energizers, the M15S, M18S, and the M113S which are ideal for game and animal control • Dual zone energizers, the M25S and the M28S offer two monitored zones in one energizer SINGLE (M15S, M18S) AND DUAL ZONE (M25S, M28S) ENERGIZER FEATURES    • High voltage monitor will alarm when the live wires are tampered with • Earth wire monitor alarms when there is tampering with the earth wires • Easy to use tag switch for controlling the unit with a keypad being optional • Connectable to armed response • Gate monitor input monitors the position of the gate to indicate if the gate is open • Gate monitor input monitors the position of the gate to indicate if the gate is open • Lightning and power surge suppression built in to reduce the possibility of damage due to power surges

• Battery backup system in case of power failure • Intelligent power saving to extend the battery life and save energy • RS 232 output, which can be used to connect the energizer into a networked system M25S AND M28S ADDITIONAL FEATURES  Dual zone energizers boast the same features as the single zoned Merlin Stealth energizers, with a few extras. This makes the unit a cost effective solution where more than one zone is required.    • Dual zones, both in High voltage and Earth wire monitoring • Synchronised zones to conform to the IEC 60335-2-76 output characteristics • Smart design allows the maximum amount of energy to be transferred to the zone that needs it, yet the combined energy of the two zones will not exceed the legal maximum permitted • Ideal product for networking and large electric fence system requirements • RS 232 output, which can be used to connect two dual zone energizers to create a four zone system

Merlin Stealth M113S Electric Fencing unit

The Merlin Stealth Energizer M113S, is a high powered energizer and revolutionises game farm and other animal control needs, by offering a monitored electric electric fence energizer. This allows the user to monitor the status of the electric fence at the energizer, and react quicker to faults on the electric fence. The M113S can power up large electric fences and helps reduce the negative effects of vegetation growing along the electric fence.  Features    • Output energy peaks at 12.7 joule into 210 Ohms •

Druid 2 Electric Fencing unit

The Druid 2, a recent introduction to the extensive range of security energizers for electric fencing, was created for the needs of smaller electric fencing requirements in an urban environment. Many features that are only available on our higher end energizers are now offered as a standard to this range. The Druid 2 can work as a standalone unit using an on/off tag to keep the operation very basic and simple to operate. Features • High voltage monitor will alarm when the live wires are tampered with • Earth wire monitor alarms when there is tampering with the earth wires of the electric fencing • Easy to use tag switch for controlling the unit • The electric fencing is Connectable to an armed response radio • Gate monitor input monitors the position of the gate to indicate if the gate is open on your electric fencing unit • Lightning and power surge suppression built in to reduce the possibility of damage due to power surges • Battery backup system in case of power failure • Intelligent power saving to extend the battery life and save energy of your electric fencing

Electric fencing BRACKETS AND ACCESSORIES Wall Top Bracket

Nemtek brackets are made to a high standard to maximise security and long life in the field. The bracket forms an integral and very important part of the Nemtek security electric fence. The level of security achieved is directly affected by the choice of bracket, the number of wires forming the electrical barrier and the distance between the brackets.  Nemtek offers a large range of brackets to suit most wall types and applications. They are made mainly from steel and are finished in a high quality coating of outdoor powder, or hot dip galvanised for coastal conditions. Our factory can on request manufacture different types of designs and finishes.

• Round bar • 5 or 6 wires • PC or HDG finish • 600 mm or 750 mm long • Round bar PVC • 5 wires • PVC finish • 600 mm long • Flatbar straight and angled • 5 or 6 wires • PC, HDG or HDG and PC finish • 700 mm or 800 m long • Squaretube straight and angled • 6, 8, 10 or 12 wires • PC, HDG or HDG and PC finish • 1 000 mm or 1 200 mm long • T-pole • 6 wires • PC or HDG finish • 600 mm long • Profile pole • 6 wires • PC or HDG finish • 340 mm long PC: Powder coated finish  HDG: Hot dip galvanised  HDG and PC: First hot dip galvanised and then powder coated

electric fencing BRACKETS AND ACCESSORIES Bracket Accessories

Wall Top Bracket Stays  Nemtek stays are made to complement the bracket range. They offer a sturdy construction and support for the brackets on the corners and at the end of a electric fence. • 600 mm or 750 mm long stays with a diameter of 8 mm  • 1 000 mm long stays with a diameter of 10 mm  • available in black or white powder coated or a hot dip galvanised finish Lugs  Lugs are used with the stays and are available for both the 8 mm and 10 mm stays. Stay Sleeve  Insulates the stay thus reducing the potential of false alarm. • UV stabilised plastic for a long life span Hammer Drive Nail In Anchors  • Nylon plug and screw • Available for all bracket sizes • Zinc for coastal applications Coach Screws and Plug  • Hot dip galvanised for coastal applications • Available for the squaretube bracket

Omega Brackets The Omega bracket offers a flexible solution to the piggy back systems, where an electric fence can use the mechanical strength of an existing electric fence to reduce the cost of constructing a complete new system. The Omegas can also be used to secure windows and roofs, thus making this bracket an extremely versatile and flexible solution. The pre punched holes allow options of where insulators can be fixed.  Features   • Available in pre-galvanised grade of mild steel for inland use • Hot dip galvanised for coastal use where corrosion is high • Available in precut lengths 900 mm, 1 200 mm, 1 500 mm, 1 800 mm, 2 100 mm, 2 400 mm, 3 000 mm, making it versatile and flexible where different lengths are required • Backing plates in 2 400 mm and 3 000 mm are available and used on corners or at the end of the electric fence where a stronger Omega is required • Light weight, easy to transport reducing handling time and transport costs • Can be configured and installed in various ways

Offset Brackets Offset brackets utilise the strength and rigidity of an existing electric fence reducing costs of the electric fence system. They are generally used for animal control and are available in 4 mm galvanised high tensile steel.  1. Live wire offset bracket Available in 225 mm offset and 450 mm. Heavy galvanising option on request.  2. Live and earth wire offset bracket Available in 225 mm offset and 350 mm. Heavy galvanising option on request.

Fence Wires   Stranded Wires The Nemtek Stranded wires are made of high tensile material making them hard to cut thus increasing the level of security. The flexibility offered by the stranded wire construction makes working with this wire easier during installation and results in a neat clean look on the fence without compromising the fence performance.   • Galvanised A grade stranded wire, 1.2 mm, 1.6 mm, 2.0 mm. The larger diameters offer lower electrical resistance for longer fence lines, are hard to cut, and have a longer life span. • Stainless steel grades 304 and 316 stranded wire, 1.2 mm and 1.6 mm diameter. The stainless steel offers a high resistance to corrosion, giving it a longer life. The 316 grade is the wire of choice for highly corrosive coastal areas. Solid Wires A variety of solid Nemtek wires are available to address the different environmental, mechanical strength, and electrical resistance requirements.   • Galvanised solid wires, light and heavy galvanised, 2.24 mm diameter. This high tensile wire is generally used for freestanding fencing where a high strength mechanical fence is needed and is generally used for game and animal control fencing applications.   Technical Manuals Electronic Brochure     • Stainless steel grade 304 and 316 solid wires, 1.0 mm, 1.2 mm diameter. Solid stainless steel offers a high resistance to corrosion and a longer life span on the fence, with the 316 grade being the wire of choice for highly corrosive coastal areas. • Aluminium solid wire, 1.6 mm and 2.0 mm wire. Aluminium wire has a very low electrical resistance allowing long fences to be powered up from only one energizer and its high resistance to corrosion offers a long life span on the fence.

Wire Description Resistance (Ohms/Km) Corrosion Guideline* Galvanised wire range Stranded galvanised wire � 1.2 mm 175 Inland � Dry favourable conditions + 50km from coast Stranded galvanised wire � 1.6 mm 100 Inland � Dry favourable conditions + 50km from coast Stranded galvanised wire � 2.0 mm 60 Inland � Dry favourable conditions + 50km from coast Light galvanised high strain wire � 2.24 mm 50 Inland � Dry favourable conditions + 50km from coast Heavy galvanised high strain wire � 2.24 mm 50 Marine / Industrial 500m-3km from coast Stainless steel 304 grade Solid stainless steel wire � 1.0 mm 1 000 Coastal areas � inland + 5-25km from coast Solid stainless steel wire � 1.2 mm 700 Coastal areas � inland + 5-25km from coast Stranded stainless steel wire � 1.2 mm 700 Coastal areas � inland + 5-25km from coast Stainless steel 316 grade Solid stainless steel wire � 1.0 mm 1 000 Coastal / Industrial, 0-500m from coast Solid stainless steel wire � 1.2 mm 700 Coastal / Industrial, 0-500m from coast Solid stainless steel wire � 1.6 mm 390 Coastal / Industrial, 0-500m from coast Solid stainless steel wire � 2.0 mm 250 Coastal / Industrial, 0-500m from coast Stranded stainless steel wire � 1.2 mm 700 Coastal / Industrial, 0-500m from coast Aluminium Aluminium Alloy 1.6 mm solid 27 Coastal / Industrial, 0-500m from coast Aluminium Alloy 2.0 mm solid 14 Coastal / Industrial, 0-500m from coast   *This table serves as a guideline only. For more accurate information, please seek professional advice on the corrosion environment and local conditions.

High Voltage Cable

Nemtek offers a range of High Voltage lead out cables from your energizer to the fence and for all other insulated high voltage transmissions. The High Voltage cables have been designed for a long life expectancy and low resistance on permanent fencing systems in most weather conditions. All Nemtek High Voltage Cables are double insulated.    S-Series High Voltage Cable  The S-Series High Voltage Cables can be used with all the Nemtek solid and stranded galvanised and stainless steel wire. • Stranded wires offer a flexible cable for ease of use  • Slim line designed for ease of installation and an aesthetically pleasing look  • The 3 core and 4 core S-Series is faster to install than the standard single core high voltage cable A-Series High Voltage Cable  The A-Series high voltage cable is used with the range of aluminium wires and galvanised earth spikes. • Ideal for coastal conditions where aluminium wire is used • Low electrical resistance reducing power and voltage drops over large distances   G-Series High Voltage Cable  The G-Series Alloy High Voltage Cable can be used with all the Nemtek solid and stranded galvanised and stainless steel wire. • It can be used where an economic version of the S-Series is required • Double insulated, stranded wires offer a flexible cable for ease of use • Slim line design for ease of installation and an aesthetically pleasing look • White or black colour available to match the fence

Plastic Insulators

Nemtek offers a range of plastic and porcelain insulators. The plastic products are all UV stabilised for external use and only virgin materials are used in their manufacture which are designed for a long life.    Round Bar Insulator • used with the 10mm roundbar  • flexible inner core for increased clearance • black and white    Flat Bar Insulator • quick fit clips on the top and bottom for faster installation  • feed through clip option built in • easy to change and maintain  • black and white    Nail On Insulator • large clips for heavy duty applications • larger clearance to eliminate power leakage • black and white    Y Standard Insulator • quick fit design � easy to replace when required • suitable for Omega and Y standard brackets • anti climb shear pin  • black and white   Pop Through Hole Insulator • secure through insulator • larger creepage distance to reduce power loss • black and white    Strain Insulator • suitable for fences using up to 2.5 mm wire • larger creepage distance to reduce power loss • black and white    Tension Bobbin Insulator • heavy duty large insulator • used with offset bracket where fire is not a concern • black only

Porcelain Insulators Fireproof insulators are generally used on game farms or farms where the likelihood of fire is high. These Nemtek insulators are made of porcelain and can withstand high temperatures for a prolonged period of time.  Features   • Fireproof • Large design to reduce power loss • Suitable for long runs • Can withstand high tension

 

Gate Contacts Heavy Duty Sliding Gate Contact   • Used for series wiring of the gate • Suitable for any sliding gate • Robust construction using stainless steel and brass, making it suitable for outdoor use in most climates • Large location plates allow for increased tolerance

 

WIRE TENSIONING SYSTEMS Tensioning Systems and Accessories   Technical Manuals

Compression Spring Limiter    • Available in a standard tension (silver) spring which can tension 1.2 mm wires and a heavy tension (gold) spring which can tension up to 1.6 mm wires • It eliminates galvanic reaction between dissimilar metal thus reducing rust and can be used with any type of wire • Available in black and white for aesthetic reasons Mini Nylon Titan Tensioner    • The fence needs to be tensioned after installation, especially when the system needs maintenance due to sagging wires • It eliminates galvanic reaction between dissimilar metal thus reducing rust • Ideal for tensioning wires up to 1.2 mm galvanised or stainless steel, and up to 1.6 mm aluminium wire • A large headed screwdriver, which is generally easily available, is used to turn the spindle Hybrid Nylon Tensioner    • Offers what the compression spring and the mini nylon titan has to offer in one easy to use system. Available in a standard tension (silver) spring which can tension 1.2 mm wires and a heavy tension (gold) spring which can tension up to 1.6 mm wires • Combination of two tensioning systems, an active system to expand and compress as required, and the mini titan can take up any slack that has been created over time Hybrid BB Heavy Duty Nylon Tensioner    • A hardy heavy duty tensioner for all weather types • Can tension from a 1.2 mm up to a 2.5 mm wire, making it very versatile • It eliminates galvanic reaction between dissimilar metal thus eliminating rust and can be used with any type of wire Standard Tensioner    • Galvanised permanent fence wire strainer • Can tension from a 1.2 mm up to a 2.5 mm wire • Only used for galvanised wires to avoid galvanic reaction Combo Tensioner Standard    • Insulator and tensioning system combined, minimising the need for an insulator • Hot dip galvanised body • Can tension from a 1.2 mm up to 2.5 mm wire • Only used for galvanised wires to avoid galvanic reaction Combo Tensioner Porcelain    • Insulator and tensioning system combined • Hot dip galvanised body • Fireproof insulator Large Tail Hook    • Stainless steel hook for long life expectancy • Large tail to fit the Nemtek range of tensioning devices • Quick fit onto the Nemtek round and flat bar insulator Hook Bolt    • Electro galvanised hook bolt, so only suitable for inland use • Adjustable nut for finer adjusting S-Hook   • Hot dip galvanised for long life expectancy • Heavy duty durable design • Suitable for the Omega brackets, angled and round corner poles

 

Earth Spikes     • Galvanised earth spike with nuts and washer     • Copper earth spike with nuts and washer

 

Magnetic Contacts