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Fence wires that are mounted on wood posts can build up an electrical charge near power lines. Important factors are:
Presence of grounding devices such as metal fence posts or weeds growing next to the fence
Non-electric fences made of barbed wire or similar material that is directly attached to steel posts are adequately grounded and will not collect an electric charge. If you are planning to install a wire fence parallel to and near a power line, use at least one steel post every 150 to 200 feet to ground the fence.
Electric fences, being specially insulated from the ground, can pick up a charge from transmission lines. Usually, the charge will drain off when the charger unit is connected to the fence; however, when the charger is disconnected either for maintenance or when the fence is being built, a small shock may be produced. Contact your local electric cooperative for assistance. Typically such a shock can be prevented by:
Again, contact Great River Energy or your local electric cooperative for assistance if you have any questions; every situation is unique.