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Dog Fence Planning Twisted Wire

Save 10% On All eXtreme™ brand 14 gauge dog fence wire

What is twisted dog fence wire and how does it work?

The most misunderstood part of the electric dog fence is twisted wire. At its core, twisted wire is actually pretty simple. Twisted wire is (as the name alludes to) 2 dog fence wires twisted together. You can purchase pre-twisted wire (we recommend this) or, with a little elbow grease and some spare time, twist your own wire.

Twisted wire plays an indispensable role in the function of your electric dog fence. Twisting two wires together creates a neutral wire that does not activate the warning or correction on your dog's collar. The twisted wire carries the signal from your transmitter box out to the main loop but remains neutral and therefore cross-able by your dog. Without the twisted wire your dog would not be able to cross the line that runs from your transmitter out to the boundary loop (see example images below). You can also use twisted wire to connect smaller loops to the main loop. Small loops can be created to keep your dog out of flower gardens, swimming pools, and just about any other no-go zone in your yard. 

You cannot use twisted wire as part of the main loop. The perimeter fence wire always needs to make a closed loop or circuit. There are many different ways to achieve a closed loop. We suggest using our sample layouts as a guide to planning your dog fence installation.

What would happen if twisted wire was not used to connect the main loop to the transmitter box for our electric fence installation? If you didn’t use twisted wire, your fence would have a “hot zone” leading from the main loop to the transmitter.  The wire would be “hot” because your dog’s receiver collar would activate as it approached this area. We use twisted wire to allow your dog safe passage over this part of the fence.


How To Use Twisted Wire

Area between the perimeter and house needs to be twisted for dog safety.

As you can see in this image, the wire needs to complete a circuit or loop around your home. The origin and completion points of your fence are always the transmitter box.

If the two wires going from the transmitter box to the main boundary loop were not twisted, your dog would not be able to run all the way around the house and would instead have a horseshoe shaped 'safe zone'.


Area needing twisting for safety and free crossing of the inside of your property

You can twist the two wires or zip tie them together to create the neutral wire needed complete the circuit without creating a live section of wire that will activate the collar(s).

We sell pre-twisted professional and factory grade wire on our site.

Twisting short lengths of wire is relatively easy. Longer lengths are more difficult because the wire jumbles up and can create a real mess. For best results with longer lengths, consider buying pre-twisted wire.


make two cuts splice back into the main dog fence loop after you have made the cuts

If you are making your own twisted wire, starting at the transmitter box, run the wire from the box out to the main loop then double back to the box to make sure you have enough wire to twist (you'll need at least twice the length that the finished twisted wire needs to be). Now, cut the wires so you have two long lengths.


twist your dog fence wire back to the origination point

Secure one end of each wire strand to a stable point, like a doorknob using a zip-tie or electrical tape (for example). Attach the free ends of wire to an electric drill and use the drill to twist your wires together. You can also hand twist but be prepared for a fight if the wire is more than a few feet long. The twisted wire is now ready to connect your transmitter box to the perimeter loop of untwisted wire.


After connecting your twisted to your dog fence transmitter procede to splice into your main loop

Once you have connected the two ends of your twisted wire to the transmitter box, you're ready to splice the other ends to the main loop wire. Use the waterproof wire splices included in your kit to connect one end of the twisted wire to each of the ends of your boundary loop.


your dog can now freely cross from the front to the back yard

Once your twisted wire is spliced to the main loop, check your transmitter for continuity by powering it up!  Most transmitters give off an audible alarm if your loop is not continuous. Finally, test your dog's receiver collar on the line to make sure it is also functioning properly.


Using Twisted Wire for interior Loops

twisted wire be used for an interior or lake loop within the boundary

This diagram demonstrates the only other way you can use twisted wire during the installation of your electric dog fence system.  You can run a twisted line from your perimeter wire to an interior area within the perimeter of your dog fence. This lake loop effectively creates an exclusion zone within the main boundary, 'fencing off' certain areas on your property such as swimming pools, gardens, or play structures. While this is a great way to customize your system, similar solutions like wireless outdoor zone pods are much easier to install. They require no buried wire. Lake loops can be prone to damage by gardening and other maintenance. One important factor to keep in mind is the field range (signal range). Interior loops emit the same signal field as your main dog fence perimeter loop. Depending on the size of your yard and position of the loop, your dog could lose a lot of space because of the signal field width.  A wireless outdoor rock exclusion zone is not prone to gardening damage and it's field is individually adjustable so you won't run into these issues. Wireless outdoor zones are only compatible with certain dog fence systems. See here for more information about wireless avoidance systems.

Watch this video to find out more about how to connect the twisted wire and how to apply its use to the boundary loop.

 Continue to Layout & Test Your Invisible Dog Fence

Comment / Questions about Dog Fence Planning Twisted Wire

Win Robinson
April 06, 2015

I want to install an invisible fence (or an appropriate alternative) at an "off the grid" camp. I have solar and generator powered batteries but do not want ot draw constant or a lot of power off the batteries...do you have a recomendation?

I would also like to use my existing IF brand collars with the system.


A popular system for travelers is the Pet Safe Stay n Play. It is a wireless system that creates a circular containment area that can be adjusted from 14 to 210 feet in diameter. The collars are rechargeable and last about 3-4 months between charging. The transmitter will draw a very low amount of power when containment is needed.
We do not have any portable transmitters that would be compatible with the Invisible Fence collars.
I hope this is helpful.
Mike McCain
Senior Dog Tech

August 15, 2015

hi just wondering youre price for 2 collars and 650m of twisted wire


It would depend upon which transmitter you currently have and what gauge wire you are interested in. I would need more information to give you an accurate price quote.
Please call us at 800-396-5517 or respond to this email with the additional information.
Thank you for choosing flexpetz.com.
Tom Caruso

gene flesher
January 09, 2016

H0w do I protect the wire going under a gravel driveway ?


Hello Gene,
We recommend you run your wire through some kind of conduit beneath the loose gravel. This will prevent the gravel from biting into the protective coating on the wire.
A good medium might be a length of PVC pipe, or garden hose. If need be, you could even use a metal conduit.
You just want to ensure that you are not running any other wire (electric, cable, phone) through there as well, as that could cause signal interference.
Otherwise, you should be dandy.

April 18, 2016

How close can the wires be to each othe. I have to run bot ends of the loop through a 1/2" pipe for 4 feet. If I shield one of the wires foil or splice a piece of coax for that distance will the exposed antenna still be functional ?
Thank you



It's recommended to keep the wires at least 3' apart, and that space will need to increase the higher you turn your transmitter up. The object is to keep the range of correction coming off the wire from touch each other. So if you want to have 3 feet of correction range, before your dog reaches the wire, you will want at least 6.5 feet of separation.

Running both lengths through the same conduit would surely cancel out your correction, leaving that area open for your dog to cross without correction.

I hope that helps.l

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