Replacing Old Shore Power Connection with Smartplug

Dec 16, 2011
260
Catalina 310 Atlantic Highlands
At the end of the winter season as I was prepping the boat for launch, I tried to connect to shore power (regular outlet) one last time to top off the batteries and one of the prongs pushed back into the socket when I pushed in the cord. So I added "replace the shore power connection" to my haul out list (we're on a mooring and rarely, if ever, use a slip during the season so I figured this job could wait). I'd heard about Smartplug and decided to go with that, even though it meant replacing my connector I use to plug into a regular outlet (when on the hard) and purchasing a new cord for connecting to shore power (pedestal) if we were ever at a slip. A couple of items were back-ordered, so it was just as well that I ordered in the Spring for Fall installation.
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I watched a couple of YouTube videos by Smartplug, and while I doubted their "just 10 minutes!" claim, I felt well enough informed before I even opened up the socket and instructions. As you can see, the old socket had burn evidence by the prong that was loose.
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I took out the screws holding the old socket in place (note that you MUST keep these for use with the new socket as it DOES NOT come with replacement mounting screws...something the instructions make very clear but I'll repeat anyway).
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When I disassembled the unit, the black wire connection (where the prong pushed in) clearly had melted plastic all around it.
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The wires didn't look great, either, so I snapped the ends off, cut the insulation back, and re-stripped them so I'd have fresh connections. Here is the before picture. The gasket also had to be pulled off (the old one is still in the picture below) and the new one that came with the Smartplug had to be put in place BEFORE connecting the wires. Another thing the instructions made clear but I could see someone forgetting to do that.
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Unfortunately, I forgot to take any more pictures until I was done, so all you get now is the finished installation.
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It took me about 30 minutes all together, but when I hooked up to the regular outlet everything was good, I had the blue "all well" light on the new cable, and the battery charger fired right up. And it is SOOOO much easier to plug/unplug than the old twist-style outlet. I wish I'd done this sooner, but I am really glad I did it now.
 
May 17, 2004
5,462
Beneteau Oceanis 37 Havre de Grace
Job well done! I made that upgrade a few years ago after my original twist-lock plug melted down twice. I’ve been very happy with it since installing.
 
Jan 7, 2011
5,292
Oday 322 East Chicago, IN
That looks great @SawyerCurt ! And something on my to do list as well.

Did you consider “repurposing” your old cord by cutting the end off and installing the SmartPlug end? i thought they offered that option, but maybe I am wrong.

looks like a great installation.

Greg
 
Nov 16, 2012
1,055
Catalina 310, 2000, #31 31 Santa Cruz
I did the same thing, although our old twist lock wasn’t in very bad shape. Still glad I spent the time and money-installation was easy.

Thinking of doing the same with our 30A RV service.
 
Sep 24, 2021
386
Beneteau 35s5 Telegraph hrbr Thetis Island
I've switched to the Smartplug receptacle and simply changed the cord-end fitting twice.. On our last boat I did have a Smartplug cord as well, much nicer than the standard yellow marintec etc.. Sadly(stupidly?) let it go with the boat.....
 

Rick D

.
Jun 14, 2008
7,178
Hunter Legend 40.5 Shoreline Marina Long Beach CA
Ill pile on and say that I did the same a couple of years ago. The twist lock was just so darn hard to see where my inlet is. I used their kit to replace the end of my power cord and used another for my 15 amp adapter for the generator. I also purchased a lightweight 100' extension (although adequate AWG) and put a 30 amp twist lock and Smart plug end on it. That I use in transient slips where the power plug may be quite a ways away. All in all, I am more than happy with the Smart Plug.
 
Jan 4, 2006
7,050
Hunter 310 West Vancouver, B.C.
Did you consider “repurposing” your old cord by cutting the end off and installing the SmartPlug end? i thought they offered that option, but maybe I am wrong.
That is DEFINITELY the way to go Greg. When I purchased mine, purchasing the fittings only was an option. DO NOT buy the entire assembly.

Seven years ago I purchased a complete Smartplug cord and sold my 15 YO Marinco cord. The old one was still looking pretty good but the Smartplug was something new and I HAD to have it.

After three years in service, it looked like a rattlesnake. It was covered in mold stains where it laid on the deck. It was not stained where it was suspended in air near the plugin at the electrical outlet.

1666543696619.jpeg


I called the manufacturer and was told that all cords went this way so "live with it" and no further discussion allowed. I was furious with this guy's attitude. My 15 YO Marinco looked nothing like this.

IMO, the cord Smartplug used for their extension cord was cheap crap. Buyer beware of this product.

Every so often I get PO'ed off and scrub the cord with soap, water, a rag, and plenty of elbow grease but stain removal is minimal.

As per Greg's thoughts, given it to do over again, I'd purchase their male and female fittings but purchase the cord from a reliable manufacturer. I have no problem with the fittings as they are electrically solid.

Has anyone else discovered this mold problem or did I just get a defective cord ?

@SawyerCurt , thanks for the opportunity to get this off my chest.
 
Jun 21, 2004
2,669
Beneteau 343 Slidell, LA
Curt,
Replaced my standard marinco plug years ago with a smart plug & repurposed the marinco cord with a smart plug adaptor. This was one of the better upgrades that i have ever done! No more problems with aligning the marinco plug and screwing that damned plastic retainer ring!!
 
Mar 8, 2019
111
ODay 322 Bodkin Creek, Chesapeake Bay
I put a Smartplug in the previous boat and used their end on the original Marinco cable. Worked fine and was a LOT less expensive than buying the complete SmartPlug cable.

Just re-located the shore plug on the Oday 322 to where it is easier to plug in and easier to keep watch for anything browning or melting on the front and back. If/when it browns* I'll replace with a SmartPlug.

* When a plug or the connection points start to brown is the time to replace the plug. The brown color is from heat in the connection overheating the plastic. The heat is from the pins starting to corrode which creates electrical resistance. Amperage times resistance creates heat and nothing in the electric world gets better with time.

fwiw - The shore plug was really hard to get to in the port locker so re-located to where it's easy to connect and disconnect. The charger is for the start battery & the house side has solar. Note the new locker light at the top too, as it and a second in the aft corner have been fantastic additions!
 
Last edited:
Dec 16, 2011
260
Catalina 310 Atlantic Highlands
Did you consider “repurposing” your old cord by cutting the end off and installing the SmartPlug end? i thought they offered that option, but maybe I am wrong.
There is an option to do that, but because we rarely use it I was just worried it would be a weak point. And until I'm retired, I'd rather keep my boat shore list to what must be done. :)
 

jssailem

SBO Weather and Forecasting Forum Jim & John
Oct 22, 2014
22,335
CAL 35 Cruiser #21 moored EVERETT WA
And until I'm retired, I'd rather keep my boat shore list to what must be done.
May your retirement come as swiftly as you desire, so you can dedicate your time enjoyably.
 
Aug 2, 2009
651
Catalina 315 Muskegon
You bet...I love my Smartplug. It'd be hard to imagine anyone installing it and regretting it.
 

Clydo

.
May 28, 2013
352
Catalina C310 SF Bay/Delta
That is DEFINITELY the way to go Greg. When I purchased mine, purchasing the fittings only was an option. DO NOT buy the entire assembly.

Seven years ago I purchased a complete Smartplug cord and sold my 15 YO Marinco cord. The old one was still looking pretty good but the Smartplug was something new and I HAD to have it.

After three years in service, it looked like a rattlesnake. It was covered in mold stains where it laid on the deck. It was not stained where it was suspended in air near the plugin at the electrical outlet.

View attachment 210327

I called the manufacturer and was told that all cords went this way so "live with it" and no further discussion allowed. I was furious with this guy's attitude. My 15 YO Marinco looked nothing like this.

IMO, the cord Smartplug used for their extension cord was cheap crap. Buyer beware of this product.

Every so often I get PO'ed off and scrub the cord with soap, water, a rag, and plenty of elbow grease but stain removal is minimal.

As per Greg's thoughts, given it to do over again, I'd purchase their male and female fittings but purchase the cord from a reliable manufacturer. I have no problem with the fittings as they are electrically solid.

Has anyone else discovered this mold problem or did I just get a defective cord ?

@SawyerCurt , thanks for the opportunity to get this off my chest.
I just replaced old shorepower cord after many years. New one from West Marine said "store out of sun when not in use" !!!!!!!.
I use it all the time to keep on board battery charger working. So thought would try using good wax to give it some
UV protection.

Clyde Thorington

C310 # 245
I LEAN TOO
San Jose, CA
 

Tom J

.
Sep 30, 2008
2,309
Catalina 310 Quincy, MA
Has anyone else discovered this mold problem or did I just get a defective cord ?
[/QUOTE)
Funny you should ask. I was just about to post to Curt that I thought the cord that came with my Smartplug was far superior to my old yellow one. The old cord would get that sticky residue on it and faded with age. The Smartplug cord stayed bright and clean, with no residue after three seasons. It says on deck while my boat is in her slip. The new cord is also more pliable and easier to handle.