Inline surge protection in the adapter body, so the pedestal joint is protected without a separate device on the cord.
| Plug / Connector Standard: | NEMA 14-50P to NEMA TT-30R |
| Maximum Current rating: | 50A to 30A |
| Maximum Voltage: | 125V/250V |
| Number of Poles and Wires: | Plug: 4 prong 3 poles 4 wires / Socket: 3 prong 2 poles 3 wires |
| Surge Protection: | Inline element housed in the adapter body |
| Indicator and Cover: | Not fitted. The version with the indicator adds an LED indicator and weather cover |
| Housing Material: | PA66 |
| Blade Material: | Nickel Coated Brass |
| Flamability Rating: | UL 94V-0 |
| Color | As shown. Custom colours available to order |
| Safety Certification: | UL 817, UL, cULus |
| Environmental Certifications: | RoHS, REACH |
| Testing: | Hi-Pot (Dielectric Withstanding Voltage), Polarity (pinout) and Continuity |
| Country of Origin: | Made In China |
| Packing: | Standard Export Carton |
The 50 amp to 30 amp adapter takes a 30 amp travel trailer to a 50 amp pedestal. The plug is a NEMA 14-50P, which fits the four-wire receptacle at a 50 amp site, and the socket is a NEMA TT-30R for the trailer shore cord.
This is the common second adapter in an RV bag: you keep the 30 amp trailer and hook it up wherever you park, 30 amp or 50 amp site, without changing the pedestal. Rated per the connectors, UL 817 with UL and cULus listing.
Use it on any 50 amp hookup serving a 30 amp trailer or camper van, and on 14-50 outlets at home when you pre-cool the fridge or run a dehumidifier on the driveway. The trailer still draws at most 30A, which is the point of the part.
One adapter is enough on this end. Do not stack the NEMA 14-50P adapter behind a second 30 amp adapter or a dogbone from the same pedestal; each joint is a heat point. Plug into the pedestal once and change the adapter if the site type changes.
The trailer sees 125V through the NEMA TT-30R socket. If the trailer inlet is a 14-50, you need the reverse part, the 30 amp to 50 amp adapter.
Common questions about NEMA 14-50P to NEMA TT-30R RV surge adapters
Yes. The NEMA 14-50P plug fits the 50 amp pedestal and the trailer cord plugs into the NEMA TT-30R socket. The trailer keeps its own 30 amp main breaker, and that breaker is what protects the cord. The 50 amp breaker at the pedestal will not trip to protect a 30 amp cord.
30A at 125V. The plug side is a four-wire 14-50 configuration, but the outlet you have installed is still a 30 amp RV connection, so nothing downstream can draw more than 30A.
It fits, because it is the same NEMA 14-50 interface. Home outlets like that are usually on a 40 or 50 amp breaker, so treat the trailer the same way you would at a park. Most people use it to pre-cool the fridge before a trip.
Do not. Use one adapter and a proper 30 amp RV extension cord, which is built as a single cord set with two moulded ends. Every extra joint adds heat and resistance, and the last adapter in the chain is usually the one that fails.
