Top 10 Best Heavy Duty Extension Cord [2022]

BY Brief_Ness
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Are you looking for the Best Heavy Duty Extension Cord. You are in the right place. Our team went through about 53028 reviews available online for Heavy Duty Extension Cord. We chose the finest ones, and prepared this list for you.

Comparison Chart of Top 10 Heavy Duty Extension Cord

NoProductScoreAction
1Southwire 2589 100-ft 12/3 SJTW Outdoor9.8Buy On Amazon
2Clear Power 100 ft Extra Heavy Duty Contractor Grade Extension Cord 12/3 SJTOW with 5 Outlet Adapter Combo9.4Buy On Amazon
3DEWENWILS Workshop Power Strip9.4Buy On Amazon
4FIRMERST 10 Feet 1875W Extension Cord Heavy Duty Low Profile White 15A UL Listed9Buy On Amazon
5Clear Power 25 ft Heavy Duty Outdoor Extension Cord 12/3 SJTW9Buy On Amazon
6FIRMERST 1875W Flat Plug Extension Cord 10 Feet 14 AWG 15A Black9Buy On Amazon
7Southwire 2588SW0002 Outdoor Cord-12/3 SJTW Heavy Duty 3 Prong Extension Cord-for Commercial Use (50', Yellow)8.8Buy On Amazon
8IRON FORGE CABLE 25 ft Lighted Outdoor Extension Cord - 12/3 SJTW Heavy Duty Yellow Extension Cable Extension Cable with 3 Prong Grounded Plug for Safety8.8Buy On Amazon
9Clear Power 50 ft Heavy Duty Outdoor Extension Cord 12/3 SJTW8.4Buy On Amazon
10POWTECH Heavy duty 6 FT Air Conditioner and Major Appliance Extension Cord UL Listed 14 Gauge8.2Buy On Amazon

Heavy Duty Extension Cord Reviews

We have checked about 53028 reviews for heavy duty extension cord. It was quite difficult to shortlist the ideal ones from thousands of variants online. However, we've tried our best to make sure that you get only the best one from our suggestions.

Disclaimer: As An Amazon Associate We Earn From Qualifying Purchases.

Table Of Content:

1. Southwire 2589 100-ft 12/3 SJTW Outdoor

Southwire 2589 100-ft 12/3 SJTW Outdoor, Heavy Duty 3 Prong Power, Water Resistant Vinyl Jacket, for Commercial Use and Major Appliances Extension Cord, 100 ft, YellowBuy On Amazon
  • ALL PURPOSE EXTENSION CORD for Indoor and Outdoor use.
  • HIGHLY VISIBLE yellow jacket provides extra safety and will not mark floors or walls
  • WATER RESISTANT flexible vinyl jacket provides protection of the cord against moisture, abrasion, and sunlight.
  • REINFORCED BLADES add durability that protects prongs from bending and/or breaking
  • LIGHTED END indicates power is on

2. Clear Power 100 ft Extra Heavy Duty Contractor Grade Extension Cord 12/3 SJTOW with 5 Outlet Adapter Combo

Clear Power 100 ft Extra Heavy Duty Contractor Grade Extension Cord 12/3 SJTOW with 5 Outlet Adapter Combo, Oil Water & Weather Resistant, Flame Retardant, Yellow, 3 Prong Grounded Plug, CPCO90001Buy On Amazon
  • All Purpose Extension Cord + Matching 5 Plug Outlet Set: Easily turns single outlet extension cord into 5 outlet extension cord, replaces bulky adaptor plugs to save space and keep extension cords organized.
  • Safe: Vinyl wire cover protects SJTOW wire from wear and tear and is oil resistant, corrosion resistant, water resistant, as well as flame retardant.
  • Made Durable for Extreme Weather Resistance: made for extreme temperatures from -58ºF up to 221ºF, wire remains flexible even in extreme cold conditions.
  • Lighted Socket: LED light indicates when power is on
  • Tested and Certified to USA and Canadian standards

3. DEWENWILS Workshop Power Strip

DEWENWILS Workshop Power Strip, 6-Outlets Strip with 15 FT Extension Cord, Heavy Duty 14/3C Gauge, SJTW Power Cord for Indoor Outdoor, 15A Circuit Breaker, Swivel Safety Covers, ETL ListedBuy On Amazon
  • Integration Design】 Combine the extension cord with a 6-outlet power hub together, no need to connect another extension cord, more safe to use.
  • 15A Circuit Breaker】 Built-in 15A circuit breaker protect devices from overload and short circuit, automatically cut off power supply when the total current of the connected devices exceed 15A；press the button after the power strip powers off.
  • 15Foot Long Cord】SJTW 14/3C gauge durable power cord is durable and wear resistant, anti-aging and sunlight, fit for indoor/outdoor use, but do not use in wet conditions; 15 foot extra long power strip, gives you flexibility to reach distant outlets and hard to reach places.
  • Swivel Safety Cover】Twist-to-Close safety covers are very user-friendly, slide to close it when not in use to effectively prevent dust and foreign objects; eliminate potential electrical hazards to you and your family.
  • Durable & Lightweight】Made of sturdy rubberized polycarbonate material, heavy duty for rigid environment like workshop or garage; due to it’s light weight compact design, very easy to bring along to a job site or keeping handy in the garage.

4. FIRMERST 10 Feet 1875W Extension Cord Heavy Duty Low Profile White 15A UL Listed

FIRMERST 10 Feet 1875W Extension Cord Heavy Duty Low Profile White 15A UL ListedBuy On Amazon
  • 3×14 AWG,15Amp 125Volt ,1875 Watts ,UL&CUL Listed ,10 Feet White.
  • HEAVY DUTY, STURDY BUT FLEXIBLE: 14 AWG (15A) extension cords with thicker wire diameters, which can handle more amperage and thus more wattage, less chance of getting hot, is safer and more reliable compared with the thinner 16 AWG ones.
  • SPACE EFFICIENT: Convert your standard AC power cord to a slim flat plug, providing angular flexibility.
  • FLAT PLUG: Designed for tight spaces like behind furniture, bookshelves, desks or anything which is close to the wall not allowing you to use the standard outlet.
  • UL CERTIFIED: Cord 3x14AWG Rating 125V / 15A.

5. Clear Power 25 ft Heavy Duty Outdoor Extension Cord 12/3 SJTW

Clear Power 25 ft Heavy Duty Outdoor Extension Cord 12/3 SJTW, Yellow, Water & Weather Resistant Flame Retardant, 3 Prong Grounded Plug, DCOC-0144-DCBuy On Amazon
  • nickel coated brass blades won’t corrode which helps prevent arcing
  • Ideal for use with heavy duty power tools and appliances
  • Water, weather and abrasion resistant, flame retardant
  • Grounded plug and connector
  • stays flexible in temperatures from -40°F up to +140°F

6. FIRMERST 1875W Flat Plug Extension Cord 10 Feet 14 AWG 15A Black

FIRMERST 1875W Flat Plug Extension Cord 10 Feet 14 AWG 15A Black, UL Listed, Pack of 2Buy On Amazon
  • SPECIFICATION】2 Pack of 10 Feet Black extension cord, 3×14 AWG, 15 Amp, 1875 Watt, 125 Volt
  • HEAVY DUTY】14 AWG cords, with thicker wire diameter, are capable of handling more power(1875W) with less resistance compared with the thinner 16 AWG ones(1625W).
  • FLAT PLUG】Designed for outlet at tight spaces like behind furniture that not allowing you to use the standard Plug.
  • FLEXIBLE & STURDY】The cords are soft and easy to fold, allow you to keep it to the edges of the furniture.
  • CERTIFICATE & WARRANTY】UL&CUL Listed, RoHS Compliant, 2 years Warranty, Safe and Durable

7. Southwire 2588SW0002 Outdoor Cord-12/3 SJTW Heavy Duty 3 Prong Extension Cord-for Commercial Use (50′, Yellow)

Southwire 2588SW0002 Outdoor Cord-12/3 SJTW Heavy Duty 3 Prong Extension Cord-for Commercial Use (50', Yellow), 50 FeetBuy On Amazon
  • ALL PURPOSE EXTENSION CORD for Indoor and Outdoor use.
  • HIGHLY VISIBLE yellow jacket provides extra safety and will not mark floors or walls
  • WATER RESISTANT: Flexible vinyl jacket provides protection of the cord against moisture, abrasion, and sunlight.
  • REINFORCED BLADES add durability that protects prongs from bending and/or breaking
  • LIGHTED END indicates power is on
  • UL Listed

8. IRON FORGE CABLE 25 ft Lighted Outdoor Extension Cord – 12/3 SJTW Heavy Duty Yellow Extension Cable Extension Cable with 3 Prong Grounded Plug for Safety

IRON FORGE CABLE 25 ft Lighted Outdoor Extension Cord - 12/3 SJTW Heavy Duty Yellow Extension Cable Extension Cable with 3 Prong Grounded Plug for Safety, 15AMP -Great for Garden and Major AppliancesBuy On Amazon
  • ALL PURPOSE EXTENSION CORD for Indoor and Outdoor use.
  • WATER RESISTANT: Flexible vinyl covering protects cords against moisture, abrasion and sunlight.
  • REINFORCED BLADES protect prongs from bending or breaking.
  • LIGHTED SOCKET – The female end of the cord lights up to indicate when the power is on.
  • LIFETIME REPLACEMENT WARRANTY – Iron Forge Cable stands behind all of its products 100%.

9. Clear Power 50 ft Heavy Duty Outdoor Extension Cord 12/3 SJTW

Clear Power 50 ft Heavy Duty Outdoor Extension Cord 12/3 SJTW, Water & Weather Resistant, Flame Retardant, Yellow, 3 Prong Grounded Plug, CP10145Buy On Amazon
  • Ideal for use with heavy duty power tools and appliances, Grounded plug and connector
  • Water resistant, weather resistant, abrasion resistant and flame retardant
  • Stays flexible in temperatures from -40°F up to 140°F
  • Nickel coated brass blades won’t corrode which helps prevent arcing
  • Agency tested and certified for use in the USA & Canada

10. POWTECH Heavy duty 6 FT Air Conditioner and Major Appliance Extension Cord UL Listed 14 Gauge

POWTECH Heavy duty 6 FT Air Conditioner and Major Appliance Extension Cord UL Listed 14 Gauge, 125V, 15 Amps, 1875 Watts GROUNDED 3-PRONGED CORDBuy On Amazon
  • Air Conditioner and Major Appliance Extension Cord UL Listed.
  • Angle Plug Allows cord to remain flush to wall in tight spaces
  • Heavy duty vinyl insulation, 14 Gauge, 1875 MAX Watts ,15 Amps,125V
  • UL LISTED – meeting the required safety standards, Safe for ANY ROOM in your home or office
  • Grey

Heavy Duty Extension Cord Buying Guide


Does the thought of finding a great Heavy Duty Extension Cord stress you out? Has your mind been juggling between choices when it comes to buying Heavy Duty Extension Cord in general, specifically regarding which model to choose?
If that’s the case, know that you’re not alone. Many people find it tough to buy the perfect Heavy Duty Extension Cord for themselves. We understand the stress associated with the buying process!
Since you’re here, you are obviously curious about Heavy Duty Extension Cord Reviews. You’ve been bombarded with information, so you need to find a reputable source with credible options before you make any decisions on which product would be best for your needs.
There are many sources that’ll provide you with that information- buying guides or ratings websites, word-of-mouth testimonials from friends or family members, online forums where users share their personal experiences, product reviews specifically found all over the internet and YouTube channels. Only thorough research will ensure that you get the right product.
But that’s not always easy, right? That's why we've taken time to compile a list of the best Heavy Duty Extension Cord in today's market, on your behalf, so that there will be no more worries for you.
How did we come up with the list, you ask? How did we create this buying guide?
  • First, our algorithms collected as much information available about these products from trusted sources.
  • We employed both Artificial Intelligence and large data volume to validate all collected information.
  • Then our AI ranked them on their quality-to-price ratio using industry-standard criteria that let us pick the best Heavy Duty Extension Cord currently on the market!
The products aren’t chosen randomly. We consider several criteria before assembling a list. Some of the criteria are discussed below-
  1. Brand Value: What happens when you go for a not-so-reputable brand just because the price seems cheap? Well, the chance of getting a short-lasting product goes higher. That’s because the renowned brands have a reputation to maintain, others don’t.
Top Heavy Duty Extension Cord brands try to offer some unique features that make them stand out in the crowd. Thus hopefully, you’ll find one ideal product or another in our list.
  1. Features: You don’t need heaps of features, but useful ones. We look at the features that matter and choose the top Heavy Duty Extension Cord based on that.
  2. Specifications: Numbers always help you measure the quality of a product in a quantitative way. We try to find products of higher specifications, but with the right balance.
  3. Customer Ratings: The hundreds of customers using the Heavy Duty Extension Cord before you won’t say wrong, would they? Better ratings mean better service experienced by a good number of people.
  4. Customer Reviews: Like ratings, customer reviews give you actual and trustworthy information, coming from real-world consumers about the Heavy Duty Extension Cord they used.
  5. Seller Rank: Now, this is interesting! You don’t just need a good Heavy Duty Extension Cord, you need a product that is trendy and growing in sales. It serves two objectives. Firstly, the growing number of users indicates the product is good. Secondly, the manufacturers will hopefully provide better quality and after-sales service because of that growing number.
  6. Value For The Money: They say you get what you pay for. Cheap isn’t always good. But that doesn’t mean splashing tons of money on a flashy but underserving product is good either. We try to measure how much value for the money you can get from your Heavy Duty Extension Cord before putting them on the list.
  7. Durability: Durability and reliability go hand to hand. A robust and durable Heavy Duty Extension Cord will serve you for months and years to come.
  8. Availability: Products come and go, new products take the place of the old ones. Probably some new features were added, some necessary modifications were done. What’s the point of using a supposedly good Heavy Duty Extension Cord if that’s no longer continued by the manufacturer? We try to feature products that are up-to-date and sold by at least one reliable seller, if not several.
  9. Negative Ratings: Yes, we take that into consideration too! When we pick the top rated Heavy Duty Extension Cord on the market, the products that got mostly negative ratings get filtered and discarded.

These are the criteria we have chosen our Heavy Duty Extension Cord on. Does our process stop there? Heck, no! The most important thing that you should know about us is, we're always updating our website to provide timely and relevant information.
Since reader satisfaction is our utmost priority, we have a final layer of filtration. And that is you, the reader! If you find any Heavy Duty Extension Cord featured here Incorrect, irrelevant, not up to the mark, or simply outdated, please let us know. Your feedback is always welcome and we’ll try to promptly correct our list as per your reasonable suggestion.