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Old 11-26-2015, 09:38 AM   #1
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Smile Added aux 20Amp input

Just completed a project that will allow me to bring an additional 20amp feed into my TT. Pretty simple and total cost about $30, also had to buy a 1 7/8 hole saw bit but otherwise parts needed were a thru the outer wall power input device that I purchased on Amazon and a standard electric outlet box. I installed the thru the wall device next to the TT pigtail access port and fed the cable [about 14"] into the void under the Jensen radio cabinet where the power cord is stowed when it is shoved back thru the port. I installed the dedicated outlet in a panel [5" x 18"] at the base of the cabinet near the floor. I replaced the thin panel with a 1/2" piece of oak cut to the same size so that I had something more substantial to mount the outlet box. Connected the cable from the input port to the outlet and then reinstalled the new panel. No fishing involved because all I had to do was reach into the void and grab the cable. I did purchase a hospital grade "orange" outlet so that it stands out from the other outlets in the TT since it will only work when a separate extension cord is used to access one of the 20A outlets on the CG power post.

Very easy project that I was motivate to do so that I will have more flexibility when running 110V space heaters on cold weather outings.
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Old 11-26-2015, 09:54 AM   #2
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Any pics or links of what parts you used?

Sounds like a nice mod!
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Old 11-26-2015, 02:14 PM   #3
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We use the Campground 20A Service all the time for our electric heaters and other high wattage items in our off-road POPUP camper... Since we don't have hard walls we just run an extension into the trailer through a window flap.

Just be cautious about combining the two services and keep them physically separated...

Depending how the campground pedestal may have been wired there is a possibility you may find 240VAC from the HOT wire on the 20A side and the HOT wire on the 30A side...

This would be a rare thing just passing along for safety reasons...

Roy Ken
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Old 11-26-2015, 07:10 PM   #4
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The part I ordered for the thru the wall port is a common rv and marine electrical item. Forget what they call them, but they are used on bassboats etc to plug in onboard charging systems to shorepower. Order mine thru Amazon. No pics as once its done it looks just like anyother outlet in the salon. That's why I stepped up to the orange color outlet.

No concern about any crossover of the power or what ever from the CG ped post. The regular 30amp plug / input and the new 20mp input are totally separate. I did not connect it in any fashion to the OEM 30amp power system. Works no differently fhan running a similar extenstion from the power post over to a picnic tent for the coffee maker. In this case the extension just plugs into the input port I added to the side of the TT. To be clear it is totally separated from the standard on-board TT power grid. If I were to over power the outlet it would trip the 20amp breaker on the external post not a breaker in the TT control converter.
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Old 11-26-2015, 08:14 PM   #5
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Bassdogs, is this something like what you did? The inlet is from Marinco. I did this awhile back. Have since changed the plug out to look like the factory one and labeled it "aux power, 15 amp max". Used 14 ga Romex. Had to order the 1&7/8 holesaw as well. I did the detachable powercord mod at the same time.Click image for larger version

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Old 11-26-2015, 08:15 PM   #6
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This is an excellent idea I will have to move this mod to project number one.

I found a marinco outlet on Amazon I think will work perfectly.


I am going to put this in my slide out under the table.
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Old 11-26-2015, 08:37 PM   #7
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Quote:
Originally Posted by TxTwoSome View Post
I am going to put this in my slide out under the table.
Be careful because the wall in the slide out is only 2" thick max. You won't have enough room to wire the inlet to the outlet. I went through the rear, then through the table that divides my 2 rockers. You might want to see if you can go through a low cabinet or something. Hope this helps.
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Old 11-26-2015, 08:38 PM   #8
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The only other safety concern I see is the 15/20AMP Shore Power extension cable should have a MALE 15/20A Plug on the pedestal side and a FEMALE 15/20A RECEPTACLE PLUG on the trailer side. i.e. NO HOT CONNECTIONS PRONGS accessible when plugged into the campground pedestal socket.

The OUTSIDE Trailer Receptacle with the lid etc will have a MALE PLUG that the 20AMP Shore Power cable will plug into like shown in TCNASHVILLEs photos...

Just a side note: Some camp grounds may not like for you to run two shore power connections from their pedestal to the trailer at the same time. I have been asked to remove my second Shore Power Cable a couple of times over the years... Their pedestal - Their reasons haha...

Roy Ken
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Old 11-26-2015, 09:12 PM   #9
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Quote:
Originally Posted by TCNASHVILLE View Post
Be careful because the wall in the slide out is only 2" thick max. You won't have enough room to wire the inlet to the outlet. I went through the rear, then through the table that divides my 2 rockers. You might want to see if you can go through a low cabinet or something. Hope this helps.
Hmmm thanks for the info. Maybe I will go into slide out under the storage area then make a box for the connections?
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Old 11-27-2015, 07:41 AM   #10
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Quote:
Originally Posted by TCNASHVILLE View Post
Bassdogs, is this something like what you did? The inlet is from Marinco. I did this awhile back. Have since changed the plug out to look like the factory one and labeled it "aux power, 15 amp max". Used 14 ga Romex. Had to order the 1&7/8 holesaw as well. I did the detachable powercord mod at the same time.Attachment 20991

Attachment 20992

Attachment 20993

Attachment 20994
YUP! Same part. Very easy to install and also ordered the 1 7/8" hole saw.
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