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NOCO AC Port Plug with Extension Cord - 16" Long

NOCO AC Port Plug with Extension Cord - 16" Long

Item # 329-GCP1
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Low-profile port plug lets you create a pass-through outlet for easy access to an AC charging port on your truck, boat, RV, or trailer. Pressure-fit cap provides a waterproof seal. 1-800-940-8924 to order NOCO accessories and parts part number 329-GCP1 or order online at Free expert support on all NOCO products. Guaranteed Lowest Price and Fastest Shipping for NOCO AC Port Plug with Extension Cord - 16" Long. Accessories and Parts reviews from real customers.
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  • Reviews (39)
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  • Videos (3)
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  • Why etrailer?

NOCO Accessories and Parts - 329-GCP1

  • Battery Charger
  • Plugs and Sockets
  • NOCO

Low-profile port plug lets you create a pass-through outlet for easy access to an AC charging port on your truck, boat, RV, or trailer. Pressure-fit cap provides a waterproof seal.


  • Low-profile port plug creates a connection point for easy access to an AC charging port
    • Plug-and-play connection - no hand wiring or modifying cables needed
    • Perfect for engine block heaters, battery chargers, RV and marine charging ports, and home improvement applications
  • Full-size AC prongs provide full contact for maximum conductivity
  • 14-AWG copper wire allows maximum current flow
  • Pressure-fit cap creates a tight seal to protect the plug against dirt, water, and debris
  • Simple flush-mount installation with included self-tapping screws
    • Requires a 2" diameter cutout
  • UL certified


  • Port plug dimensions: 3-1/8" diameter x 2-1/8" deep
    • Recessed depth: 1-13/16"
  • Extension cord length: 16"
  • Amp rating: 15 amps
  • Voltage rating: 125 volts
  • 1-Year limited warranty

NOCO GCP1 AC Port Plug with Extension Cord Dimensions

GCP1 NOCO Accessories AC Port Plug with Extension Cord - 16" Long

Installation Details 329-GCP1 Installation instructions

California residents: click here

Video of NOCO AC Port Plug with Extension Cord - 16" Long

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

Video Transcript for NOCO Accessories AC Port Plug with Extension Cord Review

Jake: Hey guys. Jake here with etrailer. Today we have the NOCO AC flush mount outlet. It's going to mount to the outside of your toolbox, like we have here, or any other accessory that you would like a flush mount plug on the outside to be able to just quickly plug into it like we have here. In our case here, we have a battery on the inside of this toolbox to be able to power our lights and fan inside our box trailer here. We don't want to have to open up the toolbox to be able to plug in our battery charger, so we mounted this flush mount outlet to the outside, so when we need to recharge our battery when we get to our destination, we just simply plug it in.Go ahead and open up the lid to show you what the inside looks like.

Something that I like about this plug, it's going to have a very simple design. You're going to have a female and a male end. The male end is going to be on the flush mount part on the outside of whatever you're using it for. And then you'll have your female end to be able to plug in whatever accessory you might be using. The rugged design is going to be dirt, water, debris, and UV resistant.

Along with the nice rubber cap we have when pushed into place, your plug is going to be watertight. Along with using it for a battery charger, like we have here, it's going to be great for those engine block heaters, any motor home application, or marine application you might need a plug outlet for.I think it's a really nice design. I like how they include this nice heavy duty cap to go with it to be able to plug it up when you're not using it. I like how it's really, really low profile so nothing's going to run into it or damage it. With that being said, let's go ahead and show you how easy it is to get installed.What we're going to need to do is we're going to need to drill a two inch hole in the side of our toolbox, because that's where our battery charters going to end up going on the inside.

We just wanted a nice flush mount design on the outside to be able to plug it in to a cord. You're going to need to decide where you want your plug located. We're going to put it back here so that when run inside, our cord is along this back wall of the toolbox.Now we can take our plug, slide it into place. You will be provided with three screws. They're a little bit smaller.

We want to use larger hardware, so we went ahead and picked up stainless steel nuts and bolts so we can get our outlet in place. Now with our hardware in place, we can go ahead and get it tightened up. Once you have everything tightened down, you're ready to insert your rubber cover and hit the road.With all that being said, that's going to do it for our look and installation of the NOCO AC outlet.

Customer Reviews

NOCO AC Port Plug with Extension Cord - 16" Long - 329-GCP1

Average Customer Rating:  4.9 out of 5 stars   (39 Customer Reviews)

Low-profile port plug lets you create a pass-through outlet for easy access to an AC charging port on your truck, boat, RV, or trailer. Pressure-fit cap provides a waterproof seal.


Easy to install after cutting holes to the template you need to download/print the .pdf installation instructions from the webpage. I did not expect the screws which come with it to secure in the steel bumper. Purchased screws and lock nuts to secure. Now I do not have an ugly plug hanging down!

Already had somebody notice it today after wondering what it was when looking at my steel bumper at a local store.

Supposed to get down below 32 degrees tonight so I will use it for the first time to keep my diesel engine warm.

Used multiple times over the winter. Worked great. Still get jealous looks questions about it.
Michael S - 02/02/2020


Very good product. Easy installation. Works great. Use in my 5x8 enclosed trailer with a power strip inside which includes USB ports for phone and such. Mounted under trailer and up front. Didn’t want to drill into the side however it comes with very robust weather proof gaskets so won’t be a problem for someone who needs on the side.


I used this on my dump trailer so I could easily charge my battery without opening my lock box exposing the battery and hydraulic pump. Works great!! The adapter will receive a large plug end. See photos.


Was looking for a two way plug to serve as a shore tie port so that it wouldn't be necessary to cut off the plug end of my new onboard battery charger and then hard wire. This product achieved that objective, albeit with a short pigtail, which also allows plugging something else to the shore tie port. Straightforward installation.


It is made well and is exactly what I was looking for. It is installed on my 2017 Nissan Titan XD Diesel 4x4 pickup truck now for the diesel engine block heater power supply. I just have to take an extension cord and plug into the truck in when needed.


I used my ac plug port for the onboard charger on my golf cart. It works great, and looks clean. The only reason this is not a five star rating is because etrailer had a bit of trouble getting this product to me.


I think it will work great, looks like a wonderful thing.


Definitely beats having your block heater cord hanging out of the bumper or grille. Part was initially on back order which I discovered after placing my order. The 5 star rating is more towards the company than the product. George J was very prompt on informing me of the situation and expected ship date. Its almost unheard of in the age of texhnology to actually receive a phone call to let me know. Keep up the good work guys! You have earned my business on customer service alone.


Very good deal on an AC port plug. I installed this on my enclosed trailer to run battery chargers while I'm not using it. The quality exceeded my expectations and installation was very easy.


Great prices and incredibly fast shippi ng.


very easy way to keep boat batteries ch arged


Excellent product at a great price,easily installed.great way to have power inside my snowmobile trailer rather than running extension cord between ramps or side door


easy install, weathertight, holding up well after several months.
i use if for trickle charger on motorcycle in enclosed trailer.


Great external 110V port for my boat, internal female 3 prong plug connects to my boat battery charger!


I was very satisfied with the plug, great quality and excellent workmanship. Will order from you again.


Great for bringing power to my teardrop trailer build.


I used for my trailer cargo. Very good quality


Good quality not flimsy well made


Exactly what I was looking to install in my camper van to support electric for my CPAP.


It works the way it was intended and install was a breeze. The parts arrived ahead of time and were well packaged.


This works great.


Great quality, should work fine.


Next millennium product here, way cleaner look than the typical plastic boxes.


Quick service! Great product. All is good. Thanks a lot


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Info for this part was:

Employee Mike L
Expert Research:
Mike L
Employee Jameson C
Expert Research:
Jameson C
Employee Cole B
Installed by:
Cole B
Employee Jacob H
Installed by:
Jacob H
Employee Chris R
Video Edited:
Chris R
Employee Daron K
Edited by:
Daron K
Employee Brian T
Written by:
Brian T

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