NEMA 14-50P to NEMA 14-50R 50 Extension Cable
This rugged NEMA 14-50 extension cord is a premium solution for high-power outdoor applications, including RV shore power hookups, Level 2 EV charging (e.g., Tesla Wall Connectors or J1772 adapters), generators, and heavy equipment like welders or pumps. Featuring a 4-prong grounded design (two hots, neutral, ground), it supports dual-voltage operation up to 12,500 watts at 250V, delivering reliable power without significant voltage drop even over extended lengths. Built with a flexible STW jacket and ergonomic grip handles for easy handling, it’s fully waterproof and UV-resistant for all-weather use in campsites, driveways, or job sites. UL-listed models ensure safety compliance, and custom lengths from 10 to 100+ feet are available for bespoke RV or EV setups, often including extras like LED indicators and storage bags. Note: The NEMA 14-50 configuration is a straight-blade (non-locking) connector, relying on the grip handles and secure fit for stability rather than a twist-lock mechanism.
Technical Information
- Plug Type: NEMA 14-50P
- Receptacle Type: NEMA 14-50R
- Electrical Ratings: 125/250V AC, up to 50A
- Configuration: 4-Wire (2 Hot Wires, 1 Neutral, 1 Ground). Essential for providing both 125V and 250V power for RV appliances and EV chargers.
- Safety Certification: UL Listed, cUL
- Colors: Black, Grey are standard; custom available
- Operating Temperature:Up to 105°C for the cord
- Applicable Cables: 4 conductors: Black/Red Hots, White Neutral, Green Ground
- Cable Length Options: 4FT, 6FT, 10FT, 25FT, 50FT (custom lengths available)
| ALTERNATE | 6/3 + 8/1 | SOW | 50/125/250 |
| XN1450P-B | 8/2 + 10/2 | DRT | 40, 125/250 |
| 8/4 | DRT | 35, 125/250 | |
| 6/2 + 8/2 | DRT | 50, 125/250 | |
| 6/4 | DRT | 45, 125/250 | |
| 8/2 + 10/2 | ST, STW, STO, STOW, STOO, STOOW | 35, 125/250 | |
| 6/3 + 8/1 | ST, STW, STO, STOW, STOO, STOOW | 45, 125/250 | |
| 6/4 | ST, STW, STO, STOW, STOO, STOOW | 45, 125/250 |

Applications:
This extension cord is the ideal solution for powering high-demand equipment:
- Recreational Vehicles (RVs): Safely extend power from a campground pedestal to your RV’s power inlet, providing full 50-amp service for air conditioners, refrigerators, and all onboard systems.
- Electric Vehicle (EV) Charging: Extend the reach of your 50-amp Level 2 EV charger (EVSE) to reach your car’s charging port comfortably. Compatible with Tesla Mobile Connector, Ford Mobile Charger, and other units using a NEMA 14-50 plug.
- Industrial & Workshop Use: Power heavy-duty tools and equipment such as large welders, industrial ovens, and power hoists that require a 50-amp, 125/250V outlet.
Custom Extension Cable Adapter
- TT-30P male plug and TT-30R female receptacle standard versions or with grid handle
- DRT, ST, STOW PVC heavy duty power cable or SOW Rubber cable, custom length ,custom color
- Custom adapter cord, made with Y shape splitter, or W shape, Twist locking plugs, sockets
NEMA 14-50 Extension Cord Manufacturer
CablesGo manufactures industrial-grade NEMA 14-50 power extension cords, engineered with a 50 Amp, 125/250V, 4-wire configuration plug and socket to deliver robust power for demanding applications such as EV charging stations, industrial machinery, and high-power welding equipment. Produced in our certified 30,000+ sqm Ningbo facility, each unit undergoes rigorous 100% in-house Hi-Pot and continuity testing to ensure full compliance with UL standards. We offer flexible customization of cord length and jacket color with a competitive 50-piece MOQ, supported by global operations that guarantee reliable 10-15 day lead times and cost-effective pricing.














