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An Electric Fence to Control Beavers


 

Introduction
Build Your Own Beaver Fence
Free Quote and Parts List
Installation Instructions
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INTRODUCTION

We cannot easily fence out beavers in the water, because they are better at building water barriers than we are, and any electric fence would instantly be neutralized by the water. However, if you await them on the land they can be fenced out readily with a simple electric fence.

The products needed to make a fence like this include a charger/energizer, short fiberglass posts, clip-on insulators, fence wire, hookup wire, connectors, a weed barrier, a ground rod, a fence tester, warning signs, and installation instructions.

BUILD YOUR OWN FENCE TO CONTROL BEAVERS: GUIDELINES

To follow these guidelines, read each section below and add appropriate items to your shopping cart.

PRODUCTS FOR AN ELECTRIC FENCE TO KEEP OUT BEAVERS

Electric Fence Charger/Energizer

The three 0.1 to 0.75 joule chargers below are all you need to repel beavers. The AC charger needs hookup wire (a long enough length to reach from your nearest AC outlet to the fence). The battery-powered charger runs on four flashlight battery D cells (not included) for a month. The solar-powered charger (more expensive) should be placed in the sun and oriented for maximum sun exposure.

Charger: AC-powered: Power Wizard PW300, 0.3 Joules (product details)
Charger: AC-powered: Power Wizard PW300, 0.3 Joules
  • ID: 01-PWIZ-AC.3J
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Charger: Solar-powered: Dare DS-40 Eclipse (0.1 Joules) (product details)
Charger: Solar-powered: Dare DS-40 Eclipse (0.1 Joules)
  • ID: 01-DAR-S.1J
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Metal U-posts

These are needed at corners, ends, and gates because the fiberglass posts below bend too much to serve well at those places. Get one 4-foot metal U-post for each corner, one for each end (if your fence comes up against a building, wall, or other fence), and two for each gate.


Fiberglass Posts

Get enough 4-foot fiberglass posts to space them roughly 10 feet apart along the fence line. These posts should be inserted one foot into the ground.

Post, Green Fiberglass, 4 Feet x 3/8 Inch, BUNDLE of 5 (FGI) (product details)
Post, Green Fiberglass, 4 Feet x 3/8 Inch, BUNDLE of 5 (FGI)
  • ID: 09-04GR-5
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Insulators

Fiberglass post insulators: Get four insulators for each fiberglass post.

Corner knob insulators: These are for corners and anyplace where the fence ends. They come in bags of 10. Get four for each corner and four for each end.

U-post insulators for gates: Get eight for each gate. 

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Fence Wire

Get enough electric fence wire (aluminum wire or polywire) to go four times around the fence. Many people will want the aluminum electric fence wire. It comes in various lengths and lasts well. But once unwound, this aluminum wire cannot be wound up again, while the polywire can. So if you want to take your fence up seasonally, or if you plan to move it about, get the polywire.

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Polywire Accessories

If you are using polywire, consider these accessories:

Tensioners: Use a polywire tensioner for every run of wire on each side of your fence if the fence is short, or for every 100 feet of polywire if the fence is long. Count a side with a gate as two sides. Note that 6 tensioners come in each pack.

Reels: If you will be dispensing over 600 feet of polywire, or if you will need to be reeling it up and storing it at season’s end, it’s convenient to get a reel. The reel holds up to a quarter-mile (1,320 feet) of polywire, so if you are purchasing more than that it is also worth getting one or more storage spools.

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Fence Accessories: Reels: Small Winder and Reel (product details)
Fence Accessories: Reels: Small Winder and Reel
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Fence Accessories: Reels: Extra Spool for Small Reel (product details)
Fence Accessories: Reels: Extra Spool for Small Reel
  • ID: 01-39
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Hookup Wire

If you’re using a battery-powered or solar-powered charger you probably don’t need hookup wire. Just put your charger within a few feet of the fence; attach your wire (or polywire) to the charger’s positive terminal; and start hanging the wire from the appropriate insulators, making sure the wire touches nothing after leaving the charger until it reaches the first insulator.

But if you have an AC-powered charger and an AC outlet more than a few feet away from the fence, you definitely need hookup wire. That’s because running an ordinary extension cord from the AC outlet and plugging the charger into it near the fence is a poor idea. Here’s why: House current is dangerous, while the charger’s low-power pulsed output is not. So plug the charger into the AC outlet directly, and then carry the charger’s output to the fence.

Unfortunately, you can’t do this with an ordinary extension cord designed to hold in 200 volts. Voltage is the electrical equivalent of pressure, and your charger puts out harmless but very high voltage. So you need something that can hold in very high voltage, and that’s what electric fence hookup wire does.

Most people won’t need over 50 feet of hookup wire to get from the charger to the fence; but if you do, longer lengths are available.

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This product is unavailable or out of stock.
Conductor: Insulated Hookup Wire, 1,000 ft. (Baygard) (product details)
Conductor: Insulated Hookup Wire, 1,000 ft. (Baygard)
  • ID: 02-32A
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Connectors

For connecting hookup wire to your fence wire, the best connector is a split-bolt style clamp. These connectors are sold in bags of 10. Plan on using one connector to join the incoming hookup wire from your charger to a charged wire on your fence, two more to connect up each additional charged wire on the fence, two more each time you need to go under a gate with hookup wire (if you have two or more gates, or if there is some structure, wall or other fence interrupting your fence), two more for each wire that needs to be reconnected on the other side, and one for any place where one spool of wire ends and needs to be connected to the wire from another spool.


Weed Barrier (Optional)

To help keep weeds off the charged wires, put a 3-foot wide strip of black polyethylene weed barrier under the path of the charged wires, and then put down an inch or two of wood chips or pine bark mulch on top of the poly film to keep the sun’s UV rays from destroying the film. (The inexpensive poly film we offer works well with either wood chips or pine bark to keep down weeds).

Weed barrier, black poly, 1.3 mils, 3ft x 50ft (product details)
Weed barrier, black poly, 1.3 mils, 3ft x 50ft
  • ID: 14-36
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Ground Rod

Most short fences (where the entire fence is within 200 feet of the ground rod) only need a little 2-foot ground rod. Put this close to your fence and connect it to your charger with any metal wire (heavily insulated wire is not needed). If the ground along the fence line is very dry or frozen at times when the fence should be working, or if the fence is long, you may need a longer ground rod.

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Gates

Get four gate handles for each gate. Set up a gate by placing two metal U-posts, each with 4 U-post insulators, at the two sides of where you want your gate. Wrap your fence wire around an insulator at one side of the gate and cut the wire, leaving enough to reach nearly all the way across the gate opening. Then attach this wire to the rear of a gate handle so that the gate handle can reach across the gate and hook itself into the insulator attached to the post on the other side. Repeat this process with the other three runs of wire.

If you plan two gates, or if there is a building or wall interrupting your fence, go under the gate with a length of hookup wire buried a few inches underground and long enough to reach from a charged wire on one side of the gate to the same charged wire on the other. Connect the hookup wire to the charged wire on both sides of the gate with two split-bolt clamps. Then connect all the wires on the far side of the gate to each other with three short (one-foot) lengths of undergate and hookup wire and six split-bolt clamps.


Electric Fence Testers

Ordinary voltmeters can’t read the pulsed high-voltage output of your charger—either when it comes out of the charger itself or when it is on your fence. You need an electric fence tester for that. Our one-lite tester merely tells you that there is voltage present, and its light can be hard to see in bright sunlight (we use the cardboard tube from a roll of paper towels to read it). For either of these reasons you may prefer to get a 5-lite model that lights up better and detects a range of different voltages.

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Testers: Electric Fence Tester, Dare, Five-lite (product details)
Testers: Electric Fence Tester, Dare, Five-lite
  • ID: 04-02
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Warning Signs (optional)

Your fence won’t harm anything, even sparrows. But warning signs will remind both the gardener and visitors of the fence’s presence. Some states require warning signs with all electric fences.

Warning Signs, pack of 3 (product details)
Warning Signs, pack of 3
  • ID: 10-01
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Installation Instructions

Free installation instructions for your fence are available on this website. To view them click here.


Purchasing Your Fence Materials

If you have gone down the above list, putting the appropriate items in a shopping cart, you now have all the materials needed to create a fence to keep out beavers and are ready to complete your purchase by checking out.

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