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12 Gauge Black Primary Wire - per foot

12 Gauge Black Primary Wire - per foot

Item # 12-1-1
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12-1-1 - 12 Gauge Deka Wiring
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Standard copper primary wire is widely used in the trailer and automotive industry for original equipment and replacement wiring. Call 800-298-1624 to order Deka accessories and parts part number 12-1-1 or order online at etrailer.com. Free expert support on all Deka products. Guaranteed Lowest Price and Fastest Shipping for 12 Gauge Black Primary Wire - per foot. Accessories and Parts reviews from real customers.
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Deka Accessories and Parts - 12-1-1

  • Wiring
  • Wire
  • Single Wire
  • Deka
  • 12 Gauge
  • 1 Wire

Standard copper primary wire is widely used in the trailer and automotive industry for original equipment and replacement wiring.


  • This 12-gauge black standard copper primary wire is widely used in the trailer and automotive industry for original equipment and replacement wiring
  • The General Purpose Thermo-Plastic (GPT) insulation is highly resistant to acids, gasoline, oil, grease and most industrial solvents
  • Meets SAE J1128 specifications


  • Maximum power rating: 50 volts
  • Temperature rating: 176 degrees Fahrenheit

12-1-1 12 Gauge Black Primary Wire - per foot

Video of 12 Gauge Black Primary Wire - per foot

Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.

Video Transcript for Deka 12 Gauge Black Primary Wire Review

Today we're going to review and install the Deka 12-gauge black primary wire, part number 12-1-1. It meets the SAE J 1128 specification, has a nice thermal plastic cover, and inside are copper leads. Here we can see the nice copper strands. They're good and durable, don't break easily. After I strap back, they can be twisted together, then routed or connected as needed. Our 12-gauge wire can handle up to 50 volts and has a max temperature of 176 degrees Fahrenheit.

It has many uses. Some typical uses will be wiring on trailers, general connections or wiring repairs. Now for this application we're going to add some 12-gauge wire, slide it into the butt connector, crimp it down. We're going to go ahead and wrap it up with some black electrical tape to help keep it clean from dirt, dust, debris, and moisture. That will do it for the review and install of the Deka 12-gauge black primary wire, part number 12-1-1.

Customer Reviews

12 Gauge Black Primary Wire - per foot - 12-1-1

Average Customer Rating:  4.9 out of 5 stars   (13 Customer Reviews)

Standard copper primary wire is widely used in the trailer and automotive industry for original equipment and replacement wiring.

- 12-1-1

It's just wire but etrailer has awesomely fast shipping especially considering the pandemic!

- 12-1-1

I have made three recent purchases from etrailer, including marker lights, wire, interior/exterior lights. I am amazing at the great service (speedy delivery, quick answer to questions, and follow-up) and high quality products. I am impressed with this company.

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Followed the instructions from the Prodigy 3 kit & etrailer's web site, every thing is working great.

- 12-1-1

Use this wire to save on costs by running it down the left side of the trailer to connect my blinkers and running lights.

- 12-1-1

Product arrived as promised and everything works great. The staff at etrailer I worked with was fantastic. Thanks, Brian

- 12-1-1

All the products I have received is exactly as they are described and I have always got great support when I had questions. I am a DIY guy and have always got very understandable answers.

- 12-1-1

Nice to have enough wire to do the job right...

Karl - 05/28/2017

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shipped really fast exactly what I was looking for at a great price.

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Perfect size for my job.

- 12-1-1


Ask the Experts about this Deka Accessories and Parts

  • Recommended Gauge of Wiring for Trailer Lights
    Trailer wiring generally uses 16 gauge wire, part # 16-1-1. However, with a long trailer like yours you may want to go with a larger like 14 gauge # DW07550-1 or even 12 gauge # 12-1-1. Each size is sold by the foot. You will need to have the lights at the rear of the trailer of brakes and turn signals. Also since the trailer will be 10 feet wide you need clearance lights on each side.
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  • Troubleshooting Trailer Wiring Circuit that Shorts Vehicle Wiring When Connected
    You've done a great job so far tracking down where the problem is. The unfortunate part though is that there is a short somewhere on the wiring of the circuit that you just haven't been able to find. You'll need to somehow find a way to track down where it is or use new wire to bypass the old wiring and short like with part # 12-1-1 which is 12 gauge wire sold by the foot.
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  • Wires Get Hot and Smell Wired to 12v Battery to Power Interior Light in Enclosed Trailer
    Yes you want to ground the 12v battery to a clean bare metal surface on the trailer frame when using a spare battery to power an interior light. You want to make sure the battery is good and all of your spliced connections are connected properly. Check any of the wiring for damaged or frayed wiring. If you are using a smaller gauge wire, I recommend a 12 gauge wire like part # 12-1-1 if you are powering a lot of lights or the lights draw a lot of power.
    view full answer...
  • Locating Wires for Electric Brake Assemblies on Used Car Hauler
    Each brake assembly on a trailer will have two wires coming out the back; a wire for ground and a wire for power. The ground wire can simply be attached to a clean, bare metal surface on the trailer frame. The power wire is what will run from the assemblies up to the front of the trailer to the 7-Way connector at the 5 o'clock position. This wire is indeed usually a 10-gauge wire with blue insulation like # 10-1-1. It's possible that the brake wire on your trailer is a 12-gauge wire instead,...
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  • Wire Gauge for 20 LED Trailer Clearance Lights on 150-Foot Run
    Twenty (20) individual LED clearance lights that each draw .048-amps at 12-volts will have a total current requirement of less than 1-amp. But a long 150-foot total wiring run will mean some losses. I recommend using dual runs of 10-gauge wire # 10-1-1 to ensure you get the full brightness from all those LED lights.
    view full answer...
  • Creating a Hot Lead from RV to Towed-Trailer Battery
    You should use 10 gauge wire, item # 10-1-1, and a 40 amp inline circuit breaker, item # PK54540, to install the hot wire in the 6-way connector at the rear of your RV. Using a fuse on the trailer side while not required, would protect your RV form any problems associated with this wire or the battery on the trailer side.
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  • Can Wire Be Added to 7-Way Wiring To Increase Length
    Yes, you can add wire to lengthen the short wire you have on your 7-way so that it stops pulling itself out. We don't carry 16 gauge wire but we do have 12 gauge as part # 12-1-1 which is sold by the foot.
    view full answer...
  • Installing Aftermarket Brake Controller On 2013 Chevrolet Silverado With Factory Brake Controller
    I have attached a link to a helpful article that explains step-by-step how to install a brake controller on your 2013 Silverado with the factory brake controller installed. You do not need to do anything with the factory controller. You will install the new brake controller by hardwiring it to the wires located under the dash about where your left shin is when in the driver seat. Connect the wires as follows: GM Wire to Brake Control Wire Function Red/Black to Black Battery Power White...
    view full answer...
  • How to Activate Aux Circuit on 1998 Chevrolet Suburban 7-Way Connector
    In order to activate the aux circuit on your Suburban's 7-Way, you will just need to run 12 gauge wire like # 12-1-1 (sold by the foot) from the pin up to the positive battery terminal in the vehicle via a 40 amp circuit breaker # 9510. Keep in mind that this will only provide a maintenance charge for the trailer battery while the vehicle is running. If you are needing to charge the battery up from a depleted state, you will want an AC to DC battery charger like the CTEK MULTI US 12-Volt...
    view full answer...
  • Installing Interior Lights in Box Truck With Switch
    You can do exactly what you are looking to do by running wire such as # 12-1-1 from the 12 volt power and then simply wire a toggle switch such as # PK34513 with your LED lights such as the Opti-Brite LED Interior Light # ILL08COB. You will also need some Butt Connectors # DW05745-10 to join the lengths of wire.
    view full answer...
  • Recommendation For Different Locations For Ground Wire
    Yes that is possible. The main concern with your ground wire is that it is solidly attached to a good ground location. Normally, one of the best and easiest places to mount your ground wire is the vehicle or trailer frame. No matter what, the ground wire needs to be firmly mounted to a clean and corrosion free metal location. Since you may need additional wire for your solution, I recommend our 12 gauge primary wire that you can purchase by the foot, Item # 12-1-1. Good luck...
    view full answer...
  • Bypassing Factory Brake Controller on 2014 Chevrolet 3500
    To bypass the factory brake controller in your 2014 Chevy Silverado 3500 you will just need to do a few things. Under the dash in your Silverado, to the left of the steering column, there should be a tow package wire bundle that is held together with a white tag. The functions for each wire should be labeled on the tag. You will find a red/black wire for the 12 volt power that will go to the brake controller black wire. Next there should be a white ground wire that will go to the...
    view full answer...
  • Wiring a 12 Volt Charge Line For a 2017 Ford Expedition
    I recommend running a 12 Gauge Wire # 12-1-1 that we offer by the foot to the front of your 2017 Ford Expedition. In line you will place a Circuit Breaker # PK54230 and use Heat Shrink Ring Terminals # DW05740-1 to connect the wire to the circuit breaker. This is best placed in the engine compartment to keep it away from water and corrosion. The circuit breaker will provide up to 30 amps of power, if power does exceed the 30 amps the breaker will trip and automatically try to reset....
    view full answer...
  • Is Reverse Light Circuit Needed When Using the Curt Echo Bluetooth Brake Controller
    If you purchased a 4-Way/7-Way Hopkins adapter like part # 37185 so that you can use the Curt Echo Mobile Trailer Brake Controller # C51180 then you are correct about only needing to connect the 12V power wire for the brake controller (in addition to connecting the typical trailer light circuits and ground). The reverse light wiring is optional and is really only needed if your trailer has a separate circuit for the reverse lights. We actually created the kit # ETBC7L for people who...
    view full answer...
  • Why is 10 or 12 Gauge Wire Recommended for Electric Brake Assemblies
    The reason that 10 Gauge # 10-1-1 or 12 Gauge # 12-1-1 wire is recommended for 10" brake assemblies, like part # AKEBRK-35-SA, is because they pull more power than the lights on your trailer. I believe the green wire you are referring to carries the right turn/stop lighting functions as you can see from the attached photo of a trailer side 4-Way. The 14 and 16 gauge wires are too small for the amount of power needing to get to the brake assemblies and they could potentially get too hot,...
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  • 2017 Wrangler Unlimited 75 Ann Edition Toad for 2016 Dynamax Grand Sport with 7 Pole Round Connector
    I have a solution for you that will still allow you to use the Roadmaster Nighthawk # RM-676 . Because your Dynamax Grand Sport has this 7 pole round connector, you're going to have to do some wiring work; there isn't a tow bar available that will have a matching 7 pole connector required to connect directly to your RV. Below you will find a list of parts that you'll need and then below that I will quickly explain how they're all going to work together. I'm also attaching a couple of...
    view full answer...
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  • 7-Way Trailer Connector and Curt C51180 Echo Wireless Brake Controller Install on 2013 Volvo XC90
    The Draw-Tite Class III hitch you referred to, part # 75152 is a confirmed fit for your 2013 Volvo XC90, as is the Tekonsha # 118411 powered taillight converter. The # ETBC7L provides an adapter that converts the 4 pole provided by the # 118411 into both a 4 pole and a 7-way, as well as 20 feet of 12GA wire, a 30 amp circuit breaker and all the necessary hardware. If you wish to obtain these parts separately, here's a listing of the part numbers. • 4-pole to 7-way/4-pole adapter...
    view full answer...
  • Wiring for Curt Echo Mobile Wireless Brake Controller and Adding Electric Brakes to a Trailer
    The Curt Echo Brake Controller part # C51180 is a great choice because of its convenient and simple installation. The 7-way connector that you mention part # A10-7084VP pugs into the 4-way connector you purchased part # C56217. The white wire from the 7-way plug needs to be grounded to a clean bare metal surface on the vehicle's frame. You are correct, the black wire from the 7-way connector needs to be extended from the plug into the engine cavity and to a 40 amp circuit part # 9510...
    view full answer...
  • How To Add 7 Way Connector to 2013 Lazy Daze Ford E450 with 4 Pole Round Connector
    To start, I don't think the Hopkins # HM40975 is going to accomplish what you're wanting to do without adding some extra parts since it's really just a socket without any wiring; I would instead recommend that you use the # ETBC7L since it comes with all of the wiring, relays, butt connectors, 4 way and 7 way connector, and will allow you to retain use of your 4 way round plug in the future. The main catch is that you'll want to use the Adapter 4 Round to 4 Flat # 47465 to plug into the...
    view full answer...
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  • How To Ground Trailer Tail Lights Without a Ground Wire To a Wooden Surface
    The Standard Trailer Light Kit with 25' Wire Harness part # TL29BK as I am sure you noticed grounds via the mounting hardware therefore there is not a singular ground wire. In order to attach this light to a wooden surface you will need to run a ground wire yourself up to the trailer tongue using the mounting studs on the back with ring terminals part # DW05705-1 and wire part # 12-1-1. The other option you have is to use the Peterson LED Light Kit for Trailers part # V944 which does...
    view full answer...
  • Parts Needed to Wire Trailer With Electric Brakes
    To add trailer brakes you'll want to start by adding a new 7 way trailer connector; for that I recommend using the etrailer Trailer Wiring 7-Way Upgrade Kit w/ Junction Box and RV Style Connector # e99011, which will give you a 7 way and a way to install all of the wiring cleanly. You'll also need some 12 gauge wire, which is available by the foot with part # 12-1-1 and some butt connectors # DW05745-10 to make the connections to the wiring. Other than that, you'll just be making connections...
    view full answer...
  • What Is Needed To Add Trailer Brake Controller To 1966 Dodge For 1966 Camper With Trailer Brakes
    That sounds like an awesome setup you are building! Id love to see some pictures once you get it all done. There is a few options for trailer brake controllers that I recommend. If you do not want to mount a trailer brake controller inside of the cab I recommend using the Curt Echo Wireless Trailer Brake Controller # C51180. The Curt Echo # C51180 is a great option since it mounts directly to your 7-way connector of your truck and doesn't require you to run any wires inside of the cab...
    view full answer...
  • Recommended Battery Charge Line for Motorhome with Toad
    If you are only using a 4 way from your motorhome it won't have the 12V power line to charge your battery in your toad. If you use a 7-way then it has that already integrated if it is connected properly. I recommend using a 7-way on your motorhome which if you only have a 4-way means using a kit like # ETBC7L and # 12-1-1 for any extra length needed. Then I recommend using the Roadmaster Diode 7-Wire to 6-Wire Flexo-Coil Wiring Kit # RM-15267 and Roadmaster Battery Charge Line Kit for...
    view full answer...
  • Converting Hydraulic Drum Brakes to Electric Brakes on Tandem 3,500 Lb Axle Boat Trailer
    Yes, plenty of people choose to use electric brakes on their boat trailer because of the lower maintenance and cost as compared to hydraulic brakes. To replace your current hydraulic brakes I recommend our Electric Trailer Brake Kit # AKEBRK-35-SA. This includes both the right hand and left hand brake assemblies, mounting bolts and adjuster plugs. If you are unable to reuse your old nuts and lock washers, those are sold separately as part # BRKH10B. Since you were checking out hub...
    view full answer...
  • Wiring Curt C56322 and 37185 4-Pole/ 7-Way Adapter to Vehicle Battery for Wireless Brake Controller
    In order to power both the taillight converter and the 12-volt feed on the 7-way, you'll want to run two circuits from the rear of the vehicle to the positive battery terminal. The # C56322 converter includes the necessary wire, fuse holder, fuse and hardware to make the connection at the battery. To power up the 12-volt feed on the # 37185 adapter that feeds the wireless brake controller like the Curt Echo # C51180, you'll need a length of # 12-1-1 wire long enough to attach to the black...
    view full answer...
  • Recommended Air Conditioning Unit Needed to Add AC to 2013 Haulmark Transport Trailer
    I have a solution for you, but there are not Furrion units that come with an included heat strip. Instead I recommend using the Advent Air RV Air Conditioner w/ Air Distribution Box, Start Capacitor, and Heat Strip - 15,000 Btu # ACM150CH which comes with a heat strip to take the chill off. This unit also has a start capacitor to allow for easier starting when your trailer may not have access to the required power to start up, since it stores power needed for each time it's required to...
    view full answer...

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