- Ensures effective connection between energizer and earth, maximising performance of fence.
Setting up your earth system
Choose the right system
- Option 1: Ground Earth Return System - Recommended where soil is conductive. This system is suitable for most moist soils.
- Option 2: Fence Wire Return System - Recommended where soil is dry, sandy or volcanic it and not conductive. The fence is constructed using both live and earth wires. If the animal touches the live wire the current flows through the animal and the ground back to the earth rods
Selecting a site for your earthing system:
- Ensure earthing system is 10 m away from other earth systems e.g. house mains, underground power or phone lines.
- Away from stock or other traffic that could interfere with the installation.
- Easily accessible for maintenance.
- Where there is damp soil all year round, e.g. swampy or shaded areas.
Insert the earth rods
The number of earth rods required depends on the type of energizer you're using to power the fence and the soil conductivity. Your local Technical Field Representative
will be able to assist in deciding the correct number of earth rods for your specific location.
- Space the required number of 2 m earth rods at least 3 m apart. If using a bentonite earth system, space the rods at least 10 m apart
- Ensure that the earth rods protrude out of the soil by 100 mm so they can be easily connected
- Connect the earth rods in a series using joint clamps and insulated cable in one continuous length without joins.
Test your earth system
It is important to test your earth system to ensure it’s working properly. To do this:
- Turn off the energizer.
- Short circuit the fence to ground at least 100 m away from the energizer. This can be done by laying steel rods or pipes against the fence. In dry or sandy soils, drive the rods into the soil up to 300 mm.
- Turn on the energizer.
- Use a digital voltmeter to measure the fence voltage. It less than 2 kV. If not, repeat steps 1 - 3 using more steel rods or pipes against the fence.
- Attach the voltmeter clip to the last earth rod of the earthing system.
- Insert the voltmeter probe into the soil at the full length of the leads.
- The voltmeter reading should be no more than 0.3 kV. If the reading is higher than this, the earth system is inadequate.
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