LEADOUTS
Use at least one 2.5mm double insulated cable as your leadout.
Two or more joined in parallel are better, as this lowers the resistance of the wire. See the table below for "Wire Resistance". Leadouts can be run either overhead or underground. Underground is preferred, as there are less chances of the leadout being interfered with by high vehicles. Where leadouts are being run underground in high traffic areas, it is recommended that the leadout cable or cables are run through irrigation tubing as an extra safeguard against damage. Using insulated cable as a leadout has several advantages.
- No chance of shorting out on sheds or the ground
- Totally waterproof
- Easily installed and long lasting
The longer a leadout wire, the greater it's resistance. Resistance of the wire is one of the biggest problems to overcome.
Larger diameter wires create less resistance and therefore better current flow.
The table below shows the Ohms resistance of galvanised steel fence wire over 1km (0.6 miles). The lower the
Ohms the lower the resistance.
Wire Diameter
mm |
Resistance
Ohms per km |
| 4.0 |
14 |
| 3.15 |
22 |
| 2.5 |
35 |
| 2.0 |
54 |
| 1.6 |
90 |
| Standard (1.6 mm) underground
cable with two layers of high quality, UV resistant, low density polyethylene - easy to strip back - resists cracking.
|
20 m (66 ft.)
25 m (82 ft.)
50 m (165 ft.)
100 m (330 ft.) |
|
| Heavy Duty (2.5 mm) with soft
(120,000 p.s.i.) galvanized wire for pliable handling. Excellent lead-out wire. |
82 ft.
100 ft.
165 ft.
200 ft.
330 ft.
500 ft.
1,000 ft. |
|
| Heavy Duty (2.5 mm) with High Tensile wire. |
165 ft.
330 ft. |
|
|
GROUNDING (earthing)
Earthing is the most important component of any electric fence system. Over 80% of all electric fence problems are attributable to poor earthing. It is important to understand how and why you need to install an effective earth system. For an electric fence to be effective a circuit must be completed. When an animal touches the fence, the circuit is completed through the ground, or earth wires, and the current flows back via the earth rods to the Energiser. See the Stafix Fencing Manual.
Lightning can cause serious damage to your energiser. When lightning strikes close to (or directly on) an electric
fence, it causes a massive surge in voltage which flows back to your energiser to find the quickest path to earth.
The only fail safe method to avoid damage occurring to your energiser during an electrical storm is to disconnect it
from the fence line and from the mains power supply. For safety reasons, never disconnect the energiser during an
electrical storm.
A practical alternative to this is to install a Stafix Lightning Diverter Kit. The kit contains all the components
needed including a Choke. The Choke creates a blocking effect for the extremely high voltages caused by
lightning. The voltage is blocked by the choke and diverted across the arrestor to earth. The earth system on
the lightning arrestor must be as good as, or better than, the earth system for the energiser.
 |
Galvanized ¾" by 7 ' Ground rod |
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| Galvanized Ground rod clamp |
|
|
82' 2.5mm insulated galvanized underground cable |
|
|
Surge protector |
|
|
Lightning Choke |
|
|
Lightning Diverter Kit |
|
|
Lightning Arrestor |
|
 |
Heavy duty cutout switch |
|
 |
Super duty cutout switch |
|
 |
Stafix Digital Voltmeter. Reads up to 9,900 volts. Waterproof case,
instant readout, liquid crystal display. |
|
Jared Holve
40,000 Bear Creek Rd.
Springville CA 93265
(559) 359 0386
Email