09-17-2013, 10:29 PM
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5 strands if overkill. You will need bags of insulators and not the cheap ones. They are not weather resistant and often break within a year. Three strands is plenty, the top and bottom are hot while the middle is the ground wire. My posts are about 30' apart so the wire moves in the wind. Horses don't like it and will remain farther away from the wire. I do use 5 posts at the corners so there is strong bracing, otherwise the corner posts will move inward from the tension.