10 Best 12-Gauge Extension Cords

For whichever reason you need a 12 gauge extension cord, you’ve come to the right place. We narrowed our list to the top 10 best 12-gauge cords on the market. With the highest reviews, dependability, durability, and just about any length, You’ll surely find the best choice for your situation below!

In Short, Here Are The Best 12-Gauge Extension Cords On The Market

  • Southwire 2549SWUSA1 100-Feet
  • EP Outdoor (100 Foot)
  • LifeSupplyUSA (75 Foot)
  • US Wire and Cable (25-Foot)
  • Internet’s Best (100 Foot)
  • Iron Forge Cable (50-Foot)
  • Southwire (100 Feet)
  • Viasonic 3 Ultra Heavy Duty (25 Foot)
  • ShineKee (100-Foot)
  • Iron Forge Cable 10 Foot

1. Southwire 2549SWUSA1 100-Feet

Made in the USA, the Southwire 2549SWUSA1 100-Feet is an excellent 12-gauge extension cord. You can use it for both indoors and outdoors. Not only is it entirely water-resistant, but you’ll also appreciate how it’s CUL listed. It has an outstanding build quality and lasts a very long time. We highly recommend it!

Users Say: “This 12/3 extension cord is perfect. I have an electric blower for cleaning off my sidewalk after I cut the grass, and this cord allows me to reach everywhere I need to go without sacrificing power to the blower. If you go cheap and get a smaller gauge cord, you’ll actually be limiting the amount of power available to your equipment. Keep that in mind when shopping around for cords. Spend the extra few dollars to get the most out of your tools.”

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Tech Specs & Details

  • Made in USA
  • Water-resistant
  • 12-Gauge
  • CUL Listed
  • 125 Volts
  • UL Listed
  • 3 size options: 25ft, 50ft, 100ft
  • Indoor or Outdoor
  • 12/3 heavy duty
  • Sun-resistant

2. EP Outdoor (100 Foot)

With a 100-foot length, the EP Outdoor (100 Foot) 12 gauge extension cord is a reliable choice. It’s all weather-resistant and provides impressive tangle-free capabilities. With 15amps, 1875 Watts, and 125 Volts, this 3-prong heavy-duty extension cable is very powerful. Be sure to check out the reviews below!

Users Say: “Very nice quality extension cable. The ends are lighted when power is plugged in. I am using this for my electric leaf blower and the 100 foot is just perfect for going around the house. Overall it worked as intended and is well made.”

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Tech Specs & Details

  • 12-Gauge
  • 3 Prong
  • 12/3
  • Heavy Duty
  • 100 Foot
  • Outdoor All-Weather resistant

3. LifeSupplyUSA (75 Foot)

The LifeSupplyUSA is an exceptional 12-gauge extension cord. You can get it in either 100ft, 75ft, or 25ft. Although it’s very dependable with high customer reviews, it provides an excellent bang for the buck. We highly recommend it!

Users Say: “I needed a heavy-duty extension cord for equipment that had to be placed a little too far from the wall outlet. The lighted3-outlet terminal is noticeable and helps me avoid stepping on it.”

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Tech Specs & Details

  • 12-Gauge
  • 3-Conductor
  • Grounded
  • 12/3 Heavy-Duty
  • 600-volt 
  • 3 different sizes: 25ft, 75ft, 100ft
  • Lighted plug

4. US Wire and Cable (25-Foot)

Also coming in 3 different sizes, the US Wire and Cable is a fantastic choice. This 12-gauge extension cord is entirely resistant against moisture, sun, and abrasion. Not only does it provide dependable power, but it’s also able to withstand temperatures as low as -35F. It’s extremely popular and with phenomenal user reviews, as well. We highly recommend it!

Users Say: “This was inexpensive enough that I bought this just for the wire. I chopped off the ends and made it into an L6-30 extension for charging my electric car. I’ve run 20A for 4-5 hours daily for months and it works great, with exactly the voltage drop and warming you’d expect from a 12 gauge cable. I’ve sent this link to others looking to do the same thing, since a pre-manufactured L6-30 extension can be over $100.”

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Tech Specs & Details

  • 15 Amp
  • 125 Volts
  • 3 size options: 25ft, 50ft, 100ft
  • 12-Gauge
  • 1875 Watts

5. Internet’s Best (100 Foot)

If you need a heavy-duty 12-gauge extension cord providing 100 feet, the Internet’s Best is an incredible choice. For either indoor or outdoor usage, it’s able to withstand extreme temperatures between-40F to 140F. You’ll also appreciate the LED lighted plugs on each end!

Users Say: “I needed something 12 gauge or better for outdoor equipment. This is packaged well and a high quality product…you get what you pay for.”

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Tech Specs & Details

  • 12-Gauge
  • Able to withstand temperature between -40° to 140° F
  • Heavy Duty
  • 3 prong
  • 100 foot or 25 foot

6. Iron Forge Cable (50-Foot)

For good reasons, the Iron Forge Cable is the most famous and highest-reviewed extension cable on the market. There are a plethora of reasons why we love it. For one, you can get it in with 3ft, 10ft, 25ft, 50ft, 75ft, 100ft, or 200ft. This 12-gauge cord also provides 125 volts, 1875 Watts, and 15 Amps. On top of that, you’ll appreciate its lifetime warranty, as well. This is one of our highest recommended 12 gauge extension cords due to its superb dependability, robust build, longevity, and overall value!

Users Say: “This is a nice heavy duty extension cord. It turned out to be overkill for my needs and I work in construction. 14 ga is all I need. The 12 gauge is heavier and bulkier which adds to the storage challenge in a work truck. If you need a heavy cord then this is a great choice.”

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Tech Specs & Details

  • 12-Gauge
  • 125 volt
  • 1875 watt
  • Water-resistant
  • Size options: 3ft, 10ft, 25ft, 50ft, 75ft, 100ft, 200ft
  • Grounded 
  • 15 amp
  • 12/3 Heavy Duty
  • 3 Prong
  • Lifetime Warranty

7. Southwire (100 Feet)

Just recently, Southwire had a hefty price cut by 29%. Although we’re unsure if this discount is permanent or temporary, we believe it’s either way, an amazing value. You can get this 12-gauge USA made extension cable in either 50ft or 100ft. It’s also water-resistant, heavy-duty, and provides lighted plugs!

Users Say: “Cord is thick but still flexible. Seems durable and doesn’t feel like some of those cheap thin cords that cost about the same. I wont buy anything smaller than 12/3. Should be able to handle 15amps without any issue. Based on the gauge of the wire it should actually be able to handle 20amps with no problem with less than 3% voltage drop over the 50 feet.”

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Tech Specs & Details

  • Made in USA
  • 12-Gauge
  • Lighted plugs
  • 2 size options: 50 foot or 100 foot
  • UL Listed
  • Water-resistant

8. Viasonic 3 Ultra Heavy Duty (25 Foot)

Next up, the Viasonic is a 12-gauge extension cable that’s resistant to both water and flame. Made with pure copper, it’s ultra heavy duty and built for maximum longevity. Providing a lighted plug, 15 Amps, 1875 Watts, and 125 Volts; This extension cord is a fabulous choice!

Users Say: “This met all my criterion including the price: waterproof… lighted… outdoor… 12 gauge… short… 3 pronged outlet. I would have preferred a camo color instead of bright blue but that’s nitpicking and I won’t go there. I’d definitely buy again.”

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Tech Specs & Details

  • Water-Resistant
  • 1875 Watts
  • 3 Wire Grounded
  • Flame Resistant
  • 12-Gauge
  • Heavy Duty
  • 15 Amps
  • 125 Volts

9. ShineKee (100-Foot)

Here is yet another one of the highest-rated customer-reviewed extension cords on the market. The 12-gauge ShineKee is a remarkable choice. One of its most prized attributes is the triple outlet construction. On top of that, you’ll enjoy its all-weather build. It’s an awesome choice and it’ll leave you satisfied. Be sure to check out the reviews below!

Users Say: “Was searching desperately for a safe extension cord for my electric heater. Having never really looked into electrical safety before I luckily found a breakdown of my heater’s specs (120v/60hz/1500watts=12.5amps), and realized I would need the 12 gauge wire, rather than the 16 gauge I originally purchased, to be guaranteed it could handle the heater’s output. I couldn’t be happier with this purchase. It actually keeps the outlet cooler than when I plugged the heater directly into the wall, and the cord itself and its two ends give off hardly any warmth even after the heater has been running for hours. I have peace of mind knowing that my house is safe with this extension, best purchase I’ve made in a while.”

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Tech Specs & Details

  • 125 Volts
  • All-Weather
  • 15 Amp
  • 12-Gauge
  • Heavy Duty
  • Indoor or Outdoor
  • 1875 Watt

10. Iron Forge Cable 10 Foot

Last but not least, the 12-gauge Iron Forge Cable comes in either 10ft or 50ft. It’s a 3-wire grounded cord with 1875 Watts and 15 Amps. Considering your situation, you might find it oil-resistant capabilities very useful, as well. It meets OSHA requirements, it’s UL listed, heavy-duty, 3-prong, and very durable. This extension cord is a phenomenal choice and it won’t let you down!

Users Say: “Whoa! Very impressed with the quality of these cables. I couldn’t believe the prices of 12 gauge 3 wire extension cords at my local box stores. I jumped at the opportunity to buy these cables at a discount in exchange for my honest and unbiased review. What I received totally exceeded my expectations. I currently have a single 50ft 12/3 extension cord in yellow that I’ve been using for years for everything from power tools to light equipment. Now I have 3. From my perspective this extension cord is every bit as nice as my 15 year old cable that cost me a lot more. Supple, soft, flexible, heavy, well constructed. There is absolutely no difference in quality that I could see between this cable and ones costing $45 and up.”

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Tech Specs & Details

  • 12/3 Heavy duty
  • 12-Gauge
  • UL Listed
  • 3 Prong
  • Meets OSHA requirements
  • 125 Volt
  • 1875 Watt

Quick Recap

Here Are The Best 12-Gauge Extension Cords On The Market

  • Southwire 2549SWUSA1 100-Feet
  • EP Outdoor (100 Foot)
  • LifeSupplyUSA (75 Foot)
  • US Wire and Cable (25-Foot)
  • Internet’s Best (100 Foot)
  • Iron Forge Cable (50-Foot)
  • Southwire (100 Feet)
  • Viasonic 3 Ultra Heavy Duty (25 Foot)
  • ShineKee (100-Foot)
  • Iron Forge Cable 10 Foot

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