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Epicord 30 Amp Twist Lock Power Inlet - Black

Epicord 30 Amp Twist Lock Power Inlet - Black

Item # 277-000138
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277-000138 - 30 Amp Twist Lock Male Plug Epicord Power Inlets
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Lowest Prices for the best rv power inlets from Epicord. Epicord 30 Amp Twist Lock Power Inlet - Black part number 277-000138 can be ordered online at or call 1-800-940-8924 for expert service.
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Epicord RV Power Inlets - 277-000138

  • 30 Amp Twist Lock Male Plug
  • Black
  • Power Inlets
  • Epicord
  • Square

  • Epicord standard twist lock power inlet
  • Robust construction and corrosion-resistant materials
  • UV stabilized glass-filled polyester
  • Black face plate
  • Plug: NEMA L5-30R
  • Amperage: 30
  • Voltage: 125
  • cETL and ETLus Listing
  • Requires hardwiring
  • Hardware not included
  • 1-Year warranty


RV060B Epicord 30A Twist Lock Power Inlet - Black


Video of Epicord 30 Amp Twist Lock Power Inlet - Black

Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.

Video Transcript for Review of Epicord RV Wiring - Power Inlet - 277-000138

Today, we're going to take a look at the Epicord 30 amp twist lock power inlet. Now this part will install on your vehicle or RV. It allows you to connect a standard 30 amp three-pronged twist plug to supply 30 amps, 125 volts to the vehicle. It is a strong, durable construction. It Uses corrosion resistant materials and UV stabilized glass filled polyester. You can see it's an all black color.Again, it's designed for your standard three prong Nema L5-30R twist lock plug.

The plug would just go on there and you can see it as a threaded ring around here. So when you plug it in and twist it, then you have a ring on there that you can tighten down for a secure connection. Again, it's 30 amps, 125 volts does meet the CETL and ETLUS listing.Now to install. It does require hard wiring. A 30 amp connection will require using at least 10 gauge or 8 gauge wiring.

And what you can do. This back will come off if you just twist it those two tabs. It will release it. And then that's where you make your wiring. So what you want to do is take this at the very back.

You unscrew this and it's a strain relief. So you can run your wiring, your gauge wire through here, bring it all the way through there to make your connections. Of course, run it through here, of course, and then through here. And then just slide this up and that'll tighten down to hold the wiring to keep from any pull being put on it to cause it to disconnect. And then once you make your connections on here, then just put your cover over it, twist it into place and it's secure.

And then again, you'll have this nice dust cover. The lid will open all the way. It has a nice foam seal up here so that when you do close it, you can hear it snap into place. And it'll give you a secure closure. It keeps any elements from getting into it.Now, the installation hardware to install this. You can see there's four holes. It's not included. You would have to supply that. And to install this flush, you do need to. It requires 2 7/8" diameter hole drill to install this. But that should do it for the review on the Epicord 30 amp twist lock power..

Customer Reviews

Epicord 30 Amp Twist Lock Power Inlet - Black - 277-000138

Average Customer Rating:  4.7 out of 5 stars   (72 Customer Reviews)


Worked like a charm! I purchased this to put a plug on my enclosed trailer that I was wiring for electric (toy hauler set up). A couple of things to keep in mind for those of you looking to do the same. The sheet metal on our enclosed trailers is much to thin to mount this plug to without some back up support. The plug itself is built sturdy enough, but our sheet metal is too thin and weak. I removed the plywood backing and welded up a steel frame with some heavy gauge sheet metal in the middle and bolted the whole support structure to the trailer studs. Then put the plywood back on and cut the hole in the side of the trailer with a hole saw bit and went through the sheet metal of the trailer, my added support sheet metal, and the plywood of the interior. Worked great. Then used self taping screws to hold the plug to the support sheet metal. That bad girl is not moving anytime soon. A couple words of caution, I would plan to use some silicone around the plug after installation. If you are like me and are removing the plug several times while wiring/cutting, you may damage the small gasket that is provided. Just to be safe a quick bead of silicone around the housing and now we covered all of the basis. One more quick tip. Don't be an idiot like me...perhaps it was all of the welding fumes from making my support bracket, or the half dozen beers I had drank during this part of the project, but for some reason I thought it would be a great idea to remove the inner part of the plug from the black housing to wire it together. DO NOT DO THIS. Cost me about 3 min of scratching my head trying to get the bad girl back together. Long story, but the message is simple, there is no need to remove any screws from this plug to install your wires. There are little windows in the back of the plug that allow you to very easily slide your screw driver into and tighten down on your wire. Also, the back of the plug is color coded to help in knowing which wires need to go to which turn lock pins.

Sorry for the long review. To recap, this product was perfect and arrived 3 days after I hit the "purchase" button. Couldn't be more happy. Thanks, etrailer!


This is the second item I have purchased from and I can say, that both of my experiences have been Five Star. The items were exactly as they described (I must also add that etrailer gives clear and detailed information which makes it easier to make a decision with confidence). Also they excel in prompt delivery and communications as to when to expect receipt of the item (in the case of both items I ordered, they both were delivered as indicated by etrailer.

These are certainly qualities which are easy to refer to in making a review, however, there is one more which I am really impressed with and one which allows me to understand why they garner an excellent review from me. When I opened my box, on the inside flap of the carton, is a statement from The statement says it all - "The bottom of this box should not be the end of our relationship. If we can help, let us know", and then they list a phone number and email address. This underscores their commitment to a great business relationship which results in a satisfied repeat customer. I will continue this relationship.


Kyle is great to work with , am making them my 1 st call for all things trailer

Paul - 04/17/2022


Have had this plug over a year now no issues what so ever easy install no leaks or cracks in it

Still works great no issues great plug
Garrett - 06/26/2022


The connection was a little loose and an arc formed that damaged the unit. Needs better locking.

You mentioned that an arc formed and I wanted to clarify that you meant an electricity arc?
-- Etrailer Expert Jenny N - 01/31/2022
Yes, an electrical arc. The plug locking mechanism is not sufficient. A simple twist but does not have enough support to avoid a slight bend producing a gap. I wish I had saved the parts to show you but I replaced the item with a much better locking plug. The plug and wires were damaged on both the male and female sides. In my opinion, there just not enough support on the cable side.
-- comment by: Roger - 01/31/2022
I reached out to the manufacturer who advised that they have not had returns involving a loose connection that resulted in the damage that was described. There are several variables that could have contributed to the arc such as a defective shore cord, or the locking ring on the cord could be cracked or an initial installation issue.
-- Etrailer Expert Jenny N - 01/31/2022


The original connector was not installed properly by the manufacturer. The wires were pushed into the connector, but the screws were not tightened. The hot lead became very “HOT” and melted the pins out of the plastic. I replaced the connector with this new one. It fit in the same place as the original. I tightened the screws and have had no problems since.

I have not had any problems with this or any products I have purchased from!!!
Phil F - 01/12/2020


Good product, functions fine door/cover still latching fine and tight.
Do not follow directions regarding hole size to drill. Recommended size is way bigger than it needs to be.

Thank you for your feedback. The outer diameter of the socket that mounts in the RV all is 2 78 inches. If you wanted to be precise, you could use a 2 78 hole saw and grind down the edges for a snug fit however I would make sure that there is a small gap for the movement of the trailer or RV wall when driving.
-- Etrailer Expert Jenny N - 10/27/2021


Not quite the quality materials of the high priced outlets, but perfectly functional for my van conversion project.


works great! closes tightly to keep rain out


This 30 Amp inlet does its job. The wiring directions were clear once we got over hole sawing through our new van.

The inlet continues to work great. We need to remember to close it firmly.
Fred S - 04/02/2020


Great prices, good products


I needed the face plate and insulation washer, and they were interchangable, so I bought the 30amp plug to use the cover on my 50amp. Perfect fit


Seems to be a sturdy product for a good price. The hinge and contacts look strong. Requires a 2-1/2-inch hole saw for installation (if my memory serves me). Could use a waterproofing gasket, but some butyl tape will fix that. Good product!


Product is exactly as advertised, simple installation. Had to use 3" hole saw as finding the requested 2 7/8" seems impossible. 3" works just fine. No issues to date.


Nice product. I bought a pair, one black, one white. While the product is nice, it's etrailer that makes the difference

Finding a piece-part like this can be a challenge. I'm an engineer and know how to do it and it's hard to plow through mfg catalogs specifying a part number among dozens of options. Even then it's hard to buy just one. OEMs and distributed want to quote a hundred or a thousand.

etrailer has done all that work, has it in stock, with helpful people and complete info in easy to understand language.

Good part, good price, in stock and delivered on time.


Good quality, easy to install, stomper instructions.


Part received as promised and was the same as noted on the website. Did note during the installation that base was a fraction smaller than the original part but no problem. Suggest adding mounting screws and gasket as a kit!


Should work, has gasket but no mounting screws. That's ok as I'll use SS screws.


Great Product, made well and is working just fine.
Would purchase again, wait we did purchase a second one for another application.......
etrailer always seams to have a quality product, you really do get what you pay for!


A perfect replacement for my old travel trailer. Great quality and easy to install, but make sure you have the right extension cord that fits with this or else you will be disappointed !


Exactly what I was looking for in my cargo trailer conversion project. Worked like a charm


Functional RV plug
Far superior than
the one [online retailer] carries primarily due to the seal created where the 3 wire cable passes into the plug assembly
Immediate delivery from etrailer, [online retailer] is 3-4 weeks out for there’s.


Purchase to install 30 amp power in an enclosed cargo trailer. Product was perfect for the project and 1/3 of the price I could source locally. Super Fast Shipping as well,


Product was delayed but I was updated regularly on status.
Service was great under tough circumstances and staff went the extra mile to stay in touch.


Good product. Great customer service. Would strongly recommend etrailer.

Show More Reviews

Ask the Experts about this Epicord RV Power Inlets

  • How Does Wire Attach to Epicord 30 Amp Twist Lock Inlet part # 277-000138
    If you remove the white casing of the Epicord 30 Amp Twist Lock Inlet part # 277-000138 you will see where wires can attach to the back of the socket. Each of the pins has a set screw that you would use to tighten the wire. Basically you would insert stripped back wire into each pin and then use the set screws to secure them there.
    view full answer...
  • What Size Hole Saw is Used to Install the Epicord 30 Amp Twist Lock Power Inlet
    If you have a typical hole saw set, then you will want to use a 3" hole saw on the Epicord 30 Amp Twist Lock Power Inlet, # 277-000138. The outer diameter of the socket that mounts in the RV wall is 2-7/8 inches. If you wanted to be very precise, you could use a 2-7/8 inch hole saw and grind down the edges for a snug fit, but I would make sure there is a small gap for the movement of the trailer or RV wall when driving.
    view full answer...
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  • Socket Recommendation for Outside of Cargo Trailer to Run 30 AMP Power to Trailer
    If the campgrounds you plan to visit will have 30 amp power sources the Epicord 30 Amp Twist Lock Power Inlet # 277-000138 that you mentioned would be the correct product to install on your trailer.
    view full answer...
  • Measurements of Epicord 30 Amp Twist Lock Power Inlet - Black Item # 277-000138
    I went out to the warehouse and measured Epicord 30 Amp Twist Lock Power Inlet - Black Item # 277-000138 for you. The overall width is 3-1/4 inches. the overall height (lid closed) is 4 inches or 7-1/2 inches with the lid opened straight up. The overall depth is 3-3/16 inches. I have included pictures showing these and other measurements for you.
    view full answer...
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  • HDTH Antenna & Cable Hookup
    It seems like you're wanting a power cord inlet for your camper. If you're wanting an black outside receptacle here's one # 277-000138. If you're looking for a cable hookup for your TV we do not sell an outside receptacle in any color.
    view full answer...
  • 30 Amp Furion Shore Power Inlet Replacement for Micro Minnie
    Yes the Furrion RV power inlet part # 431861 that you referenced is an exact replacement for what you have on your 2017 Winnebago Micro Minnie 2106DS. We don't have a black Furrion but we have a similar black one from Epicord with # 277-000138 which would work too.
    view full answer...
  • AC Distribution Panel for Multiple Outlets in Enclosed Trailer
    What you are going to need is the AC Distribution Panel # PD5500. This panel will allow you to do exactly what you are needing to safely run outlets to different locations inside your enclosed trailer. This panel measures 11.7" wide x 9.2" high x 4.1" deep and requires a cutout size of 10.5" wide x 7.5" high.
    view full answer...
  • Is 30 Amp RV Outlet Rated for 250 Volts
    30 amp outlets for RV use like the part # 277-000138 are not for 250 volt as they are for only 120. To get the 250 volt rating you'd need to go up to the 50 amp service like the outlet # F52INSBS.
    view full answer...
  • Recommended 30-Amp Components For Trailer
    We do not offer a kit for a 30 amp circuit as you requested but we do have the items you mentioned as separate items I have attached a link to our product page for the 30 amp items we offer. For a power inlet I recommend part # 277-000138. For a power cord I recommend part # A10-3025E.
    view full answer...
  • Power Inlet Availability for Cruiser RV
    We have a few different styles of power inlets for RVs. The part # A10-50INBKVP that you referenced is a 50 amp style connector. The other style is a 30 amp like part # 277-000138. This is the more popular style so it would probably be what you'd need. But you'd need to first determine the amperage draw needed for your trailer.
    view full answer...
  • SurgeGuard Shows Open Ground with Parallel Generators is There a Bypass
    Since your generators already have the inverters built in there is no need to run them through the surge protector. So adding a secong 30 amp connector to your camper that ties in to the electrical system after the surge protector would be a great solution. To do this you can use the Epicord 30 Amp Twist Lock Power Inlet part # 277-000137 which is white or the black option part # 277-000138. This with a short length of wiring will allow the connection. This connection should be made before...
    view full answer...
  • What Inlet and Plug do I Need to Install an Air Conditioner on My Enclosed Trailer?
    As far as the inlet plug you need to run your air conditioner unit, you will first need to install the Epicord 30 Amp Twist Lock Power Inlet - Black # 277-000138. Once the inlet is installed, you will be able to use a 30-amp plug like the Mighty Cord RV Power Cord - 30 Amps - 25' Long # A10-3025ED. You will then be able to connect those components to a 30-amp shore power source. I went ahead and attached a video of the installation of the inlet if you need help.
    view full answer...
  • How To Hook Up an Enclosed Trailer with Electric Lights and Outlets
    I do have some parts for you but we aren't custom trailer builders and adding electric to a trailer is not a simple task. What I can tell you is that most interior lights are 12 volt so if you want outlets, lights, and shore power you'd need both 12V DC and 110/120V AC. In order to to do this you'll first need to start with a panel like the Progressive Dynamics RV Power Control Center with AC/DC Panel and Converter/Smart Charger part # PD4135K. This is the main unit that you will run the...
    view full answer...
  • Operation of AC Unit and Other Outlet From 2000 Watt Portable Generator
    We don't carry any 20 amp power inlets. I recommend you upgrade to the Epicord 30 Amp Twist Lock Power Inlet - White # 277-000137 or black # 277-000138. This will work well with a 2000 watt generator like the A-iPower 2,000-Watt Inverter Generator w/ Parallel Kit - Senci Motor - Portable - Gas - 120V # 289-SUA2000I. This combination will allow you to run the interior plugs but not at their max simultaneously. You would need to consider adding the second generator in parallel # 289-SUA2000I-2...
    view full answer...
    Image 1 for
  • Power Inlet 30 Amp Twist in Black for 2019 Forest River Gray Wolf 26DBH
    We don't currently have the Furrion 30 amp power inlet in black, but we do have it in Stainless Steel # F30ITSSS if you want the Furrion brand name. If you want something closer to the # 431861 in style we have the Epicord 30 Amp Twist Lock Power Inlet - Black # 277-000138 or the Mighty Cord Replacement RV Power Inlet - 30 Amp Twist Lock - Black # A10-30INBKVP.
    view full answer...
  • What Does the Weatherproof Cover w/ Threaded Ring # A10-30CV Fit
    The Epicord 30 Amp Twist Lock Power Inlet # 277-000138 has it's own waterproof cover. The Weatherproof Cover w/ Threaded Ring # A10-30CV is designed to fit a Twist Lock 30 amp connector like the part # A10-30FDT.
    view full answer...
  • Wiring and Socket to Use with Progress Dynamics RV Power Control Center # PD4135K
    For 30 amps like what the Progress Dynamics RV Power Control Center with AC/DC Panel and Converter/Smart Charger # PD4135K is rated for you'd need to use 10 gauge wire minimum if made from copper or 8 gauge if made from aluminum. For a new socket to install on the side of the camper we have the Epicord 30 Amp Twist Lock Power Inlet # 277-000138 which would work perfectly as well.
    view full answer...
  • Are the RV Power Cords # A10-3025ED90 and # 277-000149 Like Extension Cords
    The RV Power Cords, like part # A10-3025ED90 and part # F3OR36SBOEM, are 30' and 36' feet long cords respectively. Depending on what connections you have they can be used as an extension cord. One end is a 30 Amp male and the other end is a 30 Amp female twist lock connector like what connects to an inlet like part # 277-000138 which would be on your RV or trailer. I have attached some review videos for you to check out.
    view full answer...
  • How To Create a Separate Battery Charge and Light Trailer Connector for a Truck Bed Camper
    I do have an option for you but most of the standard trailer connectors are not going to handle an 8 gauge wire very well as it is just too large. Therefore, your best option as you mentioned would be to just run the lights and battery charge line on separate connectors. I have attached some parts you will need below for the above option. Pollak Black Plastic, 7-Pole, RV Blade-Style Trailer Socket - part # PK12-707E Pollak Black Plastic, 7-Pole, RV-Style Trailer Connector - part # PK12706 Pollak...
    view full answer...
  • Recommendation for Adding AC Unit to Small Enclosed Trailer
    The best option we have available for your converted enclosed camper is the Advent Air RV Air Conditioner # ACM135BC because it's going to provide the most efficient cooling solution for the camper's interior during those hot summer months. We do not have any smaller AC units available and anything smaller we offer will be something like a powered ceiling fan vent which will only work to circulate air around the camper and not actually cool it down. As you mentioned in your question this...
    view full answer...
    Image 1 for
  • How To Install a 30 Amp Service on an Enclosed Cargo Trailer
    Yes, in order to set your trailer up for use with shore power you will first need an AC distribution panel. For this, I recommend a Progressive Dynamics Series AC Distribution Panel. In order to bring power into the panel you will also need a power inlet, the Epicord 30 Amp Twist Lock Power Inlet part # 277-000138 and a shore power cord, the Furrion RV Power Cord with Handle part # F3OR36SBOEM. If you want to sometimes power the trailer with a generator you will also need an adapter for...
    view full answer...
  • How to Hook a Cargo Trailer Up to Shore Power
    In order to wire your cargo trailer for both 12 volt DC and 110 volt AC power you would need to install a AC/DC distribution panel and power converter which we currently do not offer. You would then wire the 12 volt power to the converter along with all of your 110 volt outlets. In order to hook up to shore power you would first need to install a power inlet like the Epicord 30 Amp Twist Lock Power Inlet part # 277-000138. Once the power inlet is installed you would then need an electrical...
    view full answer...
  • Parts Needed to Add 30 Amp Shore Power and Solar Panels to Cargo Trailer
    There isn't a single unit that will contain everything you are looking for, but we have the parts you are looking for to complete this setup. By the way, I'm a huge fan of cargo trailer conversions and I'd love to see more of your build. Here are the parts you will want: -Power Center # PD4060LIK (for lithium batteries) or -Power Center # PD4060K (for standard batteries) -2K Watt Inverter # 34278156 -30 Amp Twist Lock Inlet # 277-000137 (White) or # 277-000138 (Black) -30 Amp Power...
    view full answer...
  • Recommended Battery Charging Solution for 4 Snowmobiles In Trailer
    To answer your first question, not exactly; your 7 way trailer plug will have a 12v feed but it is only suitable for maintaining the trailer's battery and not actually providing a full charge. When it comes to charging the sleds, you're not going to want to directly charge them from the trailer battery and you will want to use a battery charger that is powered by the trailer battery. However there are two issues with this that will need to be taken into consideration. First, in order...
    view full answer...

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Info for this part was:

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Installed by:
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Video Edited:
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