Why is the grounding of energisers so important?
A poor grounding connection is the most common reason for electric fence faults.
It is important that the energiser has a good earth connection so that the electricity can flow around the system and back to through the ground and back to the energiser unimpeded. The more powerful the energiser the better the grounding connection must be. If the grounding connection is poor, then the contact resistance is too large and the fence voltage will be reduced.
Try to position the grounding at a place where the soil remains moist year round. Poor soil conditions such as dryness, sandy soil, stones, etc. as well as leakage through overgrowth, faulty insulators, etc., will require the insertion of additional grounding stakes. These should be placed at intervals of around 3 m.
The grounding stakes/posts should be made from a corrosion-resistant material, e.g. galvanised metal tubes. A layer of rust acts as an insulator and would significantly reduce the effectiveness of the grounding. The grounding stakes are connected to each other using highly conductive and corrosion-resistant wire, e.g. flat electric fence wire, braided wire and grounding clips.
The grounding posts increase the voltage of the electric fence:
Vegetation around the electric fence reduces the voltage:
The length and number of grounding stakes needed is dependent on the strength of the energiser, the soil conditions and any disturbances. The included grounding stake will usually be sufficient for 9-volt energisers. For 12-volt electric fence battery units, the grounding stake should be about 1 m long. Strong, 230-volt mains energisers and 12-volt energisers are connected with several 1 m grounding stakes.