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This 4' adapter lets you connect your 50-amp SmartPlug cord to a 30-amp twist lock outlet at the dock.
Features:
Specs:
Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.
Hello everybody, this is Jeff at etrailer.com. Today we're gonna take a look at the SmartPlug four-foot-long marine power cord adapter, has the 50 amp female to a 30 amp male twist lock connector. Now this adapter'll let you connect a SmartPlug cord set to a twist lock outlet at the dock. Gonna zoom in and show you both connections. This is the 50 amp female connector which will plug into your SmartPlug cord set, and on this end is the 30 amp male connector that'll plug into a female twist lock outlet. Now the SmartPlug end, if you notice on each side it has these dual locking side levers which will snap the plug securely into the inlet, eliminates any stress on the connection.
Does have this nice clear cover that when you're not connected, you can just push this on and that'll keep it connected, locked into place, protect the, the clear snap-on cover protects the connector when it's not being used. Also, if you notice on the inside there you might be able to see, has a nice face gasket that when you do connect this, it'll seal against the inlet sleeve to eliminate any dirt and moisture exposure. On top right here, does have an indicator light. This will light up blue, it'll illuminate blue to indicate if the normal power is flowing. If it does become a red light that means it's a reverse polarity condition.
They do use high quality materials to hold up in extreme climates or out on the water. They use marine grade stainless steel components that'll hold up season after season. Does use nickel-plated brass electrical pins and tin wires to resist corrosion and all the plastics they use are UV and heat resistant. The cable itself is a 10-gauge marine grade cable. It's extremely flexible.
You can see it has a nice bright orange color cable so that you can see it. And this part is made in the U.S.A. Again, the total length on this, overall length if you stretch it all the way out, about four feet. Amperage again on the female end is 50 amps. The male end is 30 amps and the voltage is 125 volts.
But that should do it for the review on the SmartPlug four-foot-long marine cord power adapter with the 50 amp female to 30 amp male twist lock connector.
Customer Satisfaction Score:
98% were satisfied with this product
2% of customers were not satisfied
Ratings & Reviews
Hugh
3/24/2025
Adapter worked great!
Jameson C.
3/24/2025
Heather A.
4/10/2026
Thanks for pointing that out, and I can see how that would be frustrating. It sounds like your RV has a standard 30 amp inlet without threads, so the locking ring on this adapter doesn’t have anything to grab onto. It will still provide power, but it won’t lock in place. If you’re wanting a secure fit, we’ll want to match the adapter to the exact inlet style. If you can send a quick photo of your inlet, I can make sure you get the right one.
Do you have a question about this Shore Power Cord?
Info for this part was:
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David
12/5/2025
Great, no problems.