SPEEDWOW 50 ft 50 Amp RV Extension Cord, 125/250V with Generator Inlet Box, 6/3+8/1 Gauge STW
SPEEDWOW 50 FT 50 Amp RV Extension Cord, 125/250V Heavy Duty Extension Cord with Generator Inlet Box, 6/3+8/1 Gauge STW ETL Listed, NEMA 14-50P to SS2-50R, Waterproof Power Cord for RV Outdoor Home
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SPEEDWOW

SPEEDWOW 50 FT 50 Amp RV Extension Cord, 125/250V Heavy Duty Extension Cord with Generator Inlet Box, 6/3+8/1 Gauge STW ETL Listed, NEMA 14-50P to SS2-50R, Waterproof Power Cord for RV Outdoor Home

SPEEDWOW 50 FT 50 Amp RV Extension Cord, 125/250V Heavy Duty Extension Cord with Generator Inlet Box, 6/3+8/1 Gauge STW ETL Listed, NEMA 14-50P to SS2-50R, Waterproof Power Cord for RV Outdoor Home50FT 50A Generator Power Cord Pre Drilled Power Inlet Box Heavy Duty RV Extension Cord 4 Prong 125V 250V 12500W Twist Lock Connector Generator House50 Amp Generator Extension Cord Power Inlet Box Heavy Duty NEMA14 50P SS2 50R Twist Locking Adapter Plug RV Camper Generator House 6 3 8 1 Gauge ETL50 Amp Generator Extension Cord Power Inlet Box Heavy Duty NEMA14 50P SS2 50R Twist Locking Adapter Plug RV Camper Generator House 6 3 8 1 Gauge ETL25FT 50A Generator Power Cord Pre Drilled Power Inlet Box Heavy Duty RV Extension Cord 4 Prong 125V 250V 12500W Twist Lock Connector Generator House50 Amp Generator Extension Cord Power Inlet Box Heavy Duty NEMA14 50P SS2 50R Twist Locking Adapter Plug RV Camper Generator House 6 3 8 1 Gauge ETL20FT 50A Generator Power Cord Pre Drilled Power Inlet Box Heavy Duty RV Extension Cord 4 Prong 125V 250V 12500W Twist Lock Connector Generator House15FT 50A Generator Power Cord Pre Drilled Power Inlet Box Heavy Duty RV Extension Cord 4 Prong 125V 250V 12500W Twist Lock Connector Generator House
Cord Length:50 ft
Actual Color:Steel BOX

Key item features

  • ➤【50-Amp RV Extension Cord】Engineered for high-power applications. Features a 4/3+8/1 AWG configuration (3 x 6 AWG conductors + 1 x 8 AWG ground wire) with 100% pure copper for maximum conductivity. Equipped with a standard adapter-style NEMA 14-50P male to SS2-50R female plug, compatible with most 50A RVs and generators. Its dual-voltage 125/250V design supports up to 12,500W of power output. The heavy-duty, flame-retardant PVC jacket offers superior abrasion and weather resistance, built to withstand tough outdoor conditions. Optimized wire gauge minimizes voltage drop over long distances.
  • ➤【50 Amp Generator Inlet Box】Comes with an SS2-50P three-prong plug that works with all NEMA SS2-50 standard 50-amp generator cords. The upgraded design includes four pre-drilled mounting holes for easy, tool-free installation. Dual-side cable entry and a spacious interior allow smooth routing of thick cables through pre-set ports. The roomy layout ensures cleaner wiring, better heat dissipation, and extended product life.
  • ➤【ETL-Certified Safety】This 50ft 50-amp RV power cord and inlet box kit is ETL-certified, delivering reliable and safe outdoor power. The inlet box includes a safety indicator light—green means go. For optimal performance, fully extend the cable during use to prevent overheating and verify that the 4-prong plug (NEMA 14-50P) matches your outlet. Designed specifically for RVs, this extension solution offers a safer, more convenient power experience.
  • ➤【All-Weather Durability】Built with high-purity stranded copper cores and rated IP68 for complete waterproof protection. A dual-layer STW sleeve and heavy-duty flame-retardant heat-resistant PVC exterior guard against sun, rain, and physical wear while remaining flexible for easy storage. The female connector features an adjustable threaded locking ring for a secure, waterproof seal. The heavy-gauge metal inlet box is coated with anti-rust finish and uses a twist-lock connector to ensure a solid, weatherproof connection that stands up to rain, wind, and corrosion. The flip-cover design, paired with an internal high-density waterproof gasket, effectively keeps out dust and moisture for long-lasting reliability.
  • ➤【Ergonomic Handle Design】The ergonomically shaped handle offers a comfortable, secure grip that fits naturally in your hand. It makes plugging and unplugging easier while reducing strain on the plug and cord—enhancing durability and safety.
  • ➤【Flexible & Easy to Store】Made from tough yet flexible materials that stay pliable even in temperatures as low as -40°F, resisting kinks and cracks in harsh outdoor environments. Includes an adjustable cable winder for neat coiling and hanging—making transport and storage tidy, tangle-free, and convenient.
  • ➤【Wide Range of Uses】This outdoor extension cord provides a reliable backup power supply during emergency outages and delivers stable, high-output electricity for camping, RV hookups, yacht power, job sites, and outdoor events. Whether responding to unexpected situations or meeting daily outdoor power needs, it ensures safe, dependable power anytime, anywhere—so you never have to worry about staying connected.
Current price is Now $239.99
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was $359.99
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4.509740259740259 stars out of 5, based on 308 seller reviews(4.5)
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About this item

Product details

Specifications

Warranty

Customer ratings & reviews

4.6 out of 5 stars
stars140 ratings115 reviews
How item rating is calculated
  1. 5 stars86% (120)
  2. 4 stars5% (7)
  3. 3 stars1% (2)
  4. 2 stars1% (2)
  5. 1 star6% (9)

Reviews summary

Pros

  • : Offers great value for the quality.
  • : Made with durable components for easy installation.
  • : Provides a reliable link to a generator.
  • : Suitable for most campground layouts.
  • : Handles power loads without issue.

Neutral

  • : Can be secure, but may not fit all inlet styles.
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Showing 1-3 of 115 reviews

Feb 16, 2026
Dana
Item details
Cord length: 25 ft
Color: PVC BOX
Sold bySPEEDWOWDelivered byWalmart
5 out of 5 stars review

Verified Purchase

SPEEDWOW 25 ft 50 amp RV extension cord kit

Get power from your generator to your home with ease. This kit has everything you need, and is well made. When not in use it comes with a hanger to put your cord away. I highly recommend this kit!

Incentivized Review
Helpful?4J3LDZ9M1DHS13138806328
Feb 3, 2026
RP
Item details
Cord length: 25 ft
Color: Steel BOX
Sold bySPEEDWOWDelivered byWalmart
5 out of 5 stars review

Verified Purchase

works

The 50 amp cord was shipped and received quickly. We were able to get the receptacle connected and the cord hooked up to the generator in just a few minutes.

Incentivized Review
Helpful?4J3LDZ9M1DHS13138806328
Apr 11, 2026
Kelly
Item details
Cord length: 25 ft
Color: Steel BOX
Sold bySPEEDWOWDelivered byWalmart
5 out of 5 stars review

Verified Purchase

Overall, this has been a very good product to use with our RV, very good quality and long lasting durability

Incentivized Review
Helpful?4J3LDZ9M1DHS13138806328