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How to Build a Seven Wire Fence

The seven wire fence is a basic fencing system that allows livestock owners the freedom to contain just about any animal species. The number of wires on this type of fence ensures the containment of small livestock, such as sheep and goats, just as much as large livestock, such as cattle and horses. Although you can technically construct a seven wire fence from almost any type of fencing material, high tensile wire is the most common kind of wire livestock owners use, due to its easy installation, low price tag, and low maintenance requirements.

Difficulty: Moderately Challenging
Instructions

Things You'll Need:

  • T-post driver T-posts Chalk 12.5-gauge galvanized smooth wire Terminal insulators Line post insulators Wire cutters Insulated cable Fence charger
  1. Step 1

    Make sure the posts are structurally sound. Walk the perimeter of your proposed fence line and check the frequency of the posts. On level ground, line posts should be about 40 to 50 feet apart. If you need extra posts, use a T-post driver to pound in additional steel T-posts in between the existing posts.

  2. Step 2

    Using chalk, mark the locations on the corner posts where you want the seven wires to go. Starting at the ground, the spacing between your wires should be as follows: six inches from the ground, five inches, five inches, six inches, eight inches, eight inches, ten inches. These proportions produce a seven wire fence that is approximately 48 inches tall. You will need to electrify the first (lowest wire), third, fifth, and seventh wires.

  3. Step 3

    Install terminal insulators at the corner posts. For each insulator, cut a section of wire from your wire roll that is long enough to wrap around your post three times. Wrap the piece of wire around the terminal insulator and then around the post twice before twisting the ends together to secure it. Locate a terminal insulator on the chalk mark for each wire on each anchor post.

  4. Step 4

    String the wire for the lowest wire, starting at a corner post and stretching it to the next anchor post. Thread the wire through line post insulators and attach them to the line posts. Repeat this step for each stretch of wire between anchor posts. Repeat this again for each wire until you have installed all seven strands of wire.

  5. Step 5

    Install ratchet-type strainers on each wire. Locate the strainers in the center of the longest straight stretch of the fence. Use the strainers to tighten each wire so they stretch straight across between posts without any sagging.

  6. Step 6

    Connect together the four wires that you need to electrify by using an additional section of wire, which is called a jumper wire. Locate the jumper wire at the anchor post that is closest to your fence charger. Wrap the jumper wire around the bottom strand then connect it to the third strand, the fifth strand, and the seventh strand. Be sure none of these wires touch the grounded wires by covering the exposed parts of the jumper wire with insulated cable. Attach the jumper wire to another piece of insulated wire, called the lead out wire. Connect the lead out wire to the positively charged fence terminal on your fence charger.

Tips & Warnings
  • Never disconnect the fence or work on wiring during a lightning storm.
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