Which Port for incoming from Solar Generator? And Why?

I've got a physical question related to the wiring. Underneath the bench seat is the converter and associated wiring. The wiring heads to the junction box through a 2" black plastic pipe which goes under the wet bath to the front of the trailer. I can see these wires coming out of the bottom of the trailer through a gasket and then to the J-Box.

I would like to run a new wire from the J-Box to under the bench seat but for the life of me can't get anything to fish through. I can't clearly see the "in-between" space to be able to properly fish -- it's going somewhere, but not coming out under the seat.

Here is what I am trying to do:

Install a new three-way battery switch in the front box.

1. Battery 1 = Lead Acid that came from the tab. 
2. Battery 2 = The Ecoflow

The common output from the switch would go to the current red 10GA power wire through the J-Box and power the trailer as usual.

My rationale:

• The switch keeps the battery chemistry separate. The trailer is powered by Battery 1 or 2 only. (The switch has a "both" setting which I would not use.)
  
  
• I want to leave the battery switch in the current location. I could move it inside, but the current location allows me to easily check I have set it to Battery 1 before towing, thus keeping the trailer brakes operational.
  
  
• I want the Ecoflow inside the trailer to prevent theft and keep it dry. That's the purpose the wire from under the seat -- to bring the 12v hot back out to the switch in the storage tub.
  

While I'd love to figure out how to fish through the current tubing, I am open to other ideas to get the wire from one end to the other and keep it sealed against dust and water.

pthomas745 said:

Did you find the Secret Life Of Wires thread?  With a description of "Magic Smoke"?  Getting a cable from the front of the trailer to the back has always been one of the great dreams of Tabdom.  Only a few have done the deed and lived to tell the tale. 

https://tab-rv.vanillacommunity.com/discussion/13824/the-secret-life-of-wires/p1

Yes. I found that one, too! Hopefully no magic smoke on my trip.

This has turned into an interesting project. Try as I might, I was not able to do the deed and so cannot tell the tale. But I did figure out an interesting alternative. (Actually, two alternatives.)

1. From the spare battery thread, I decided to make a 7-pin to cigarette lighter cable to allow me to power externally from the Ecoflow.



This was assembled from the following items:

- CURT 58150 Vehicle-Side 7-Pin RV Blade Trailer Wiring Harness Connector
(https://www.amazon.com/dp/B001EP0G72?psc=1&ref=ppx_yo2ov_dt_b_product_details)

- YCIND Heavy Duty 12AWG 30A Male to Male Cigarette Plug Cigarette Lighter Adapter Charger Cord With LED Lights 3ft (3FT) 
(https://www.amazon.com/dp/B0B2F9S698?ref=ppx_yo2ov_dt_b_product_details&th=1)

- Scotch 130c black rubber splicing tape
(https://www.lowes.com/pd/Scotch-130C-Black-Rubber-Splicing-Tape-30-ft-Black-Electrical-Tape/5014312885)

The tape is probably overkill, but it keeps everything tight and waterproof.

2) I decided to create permanent conduit using 3/4" Schedule 40 liquid-tight conduit. It will go from the front storage tub, above the corrugated plastic along the trailer frame, and then into an LB conduit box up through the floor under the seat.

I've added an XT60 connector to plug in the Ecoflow. That will go back out to a four-way battery disconnect switch in the storage tub. Power to the trailer will come in from the J-Box using the original wiring.



Still in progress, so no more pictures. I like the idea of easily fishing this conduit for future projects like a backup camera wired to the reverse lights on the 7-pin.

We're headed to Gulf Shores, Alabama for a week, so no T@B projects until I get back.