Electric Fences

Proper Grounding

Proper grounding is critical. Depending on the type and moisture content of the soil, the actual grounding level required by the energizer will vary. For the average soil, it is recommended a 5 Joule low impedance charger is grounded with three, 8-foot ground rods spaced at least 10 feet apart. Doubling the Joule output of the energizer would double the grounding required.

Location of the Energizer

The energizer must have an out grounding electrode in order to prevent unintentional shock from occurring. The location of the energizer must never be grounded to the farms electrical grounds, metal water pipes, or to metal objects in a building such as stalls, fences or dividers. Improper grounding puts the metal objects and livestock in the electric fence’s earth return path.

The best place for the energizer may be outdoors and away from livestock building and the grounded equipment. If the energizer is installed indoors, the high voltage must be taken to the outside using high voltage lead cable (20,000 volt insulation is recommended). Electrical wire of the type used or the building wiring with 600 volt insulation must never be used for this purpose.

Low Impedance Energizers

A low impedance energizer delivers a very high current for a very short time. Even if some grass or other vegetation is touching the fence, the system can deliver enough current to control livestock providing that the appropriate number of ground rods has been used. An energizer that is labeled by a testing laboratory is recommended.

Standard fence circuit can use single or multiple wires with the animal contact made between the fence and the earth. In areas where the soil is sandy or dry, the path is easy to obtain and continuous ground is recommended.

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