Wire Run for Lithium Setup

RPMustang

We have a '21 400 Boondock. Installing a Dakota Lithium 200 AH battery and all the associated equipment.  Ran heavy 1/0 guage wire in our tow vehicles rear bumper. Now planning to run the wire from the tongue of the T@B 400 into the battery area under the bed for Victron 30 AMP DC to DC charger. I cannot locate any wiring diagrams for the existing electrical system. If anyone can enlighten me with any experience with a similar project I will greatly appreciate it.
Thanks,
Rick

MuttonChops

There are no 'formal' nüCamp provided Electrical Diagrams.
There are no electrical Wire Routing Diagrams.

A few owners have created different types of Model-400 Electrical Distribution diagrams/drawing.  PDF and img files of those diagrams can be found in the Manuals & Resources Section of the forum.
Here is a link:

Some Model-400 Electrical Wiring Diagrams

pthomas745

This thread has a discussion about running wiring for all sorts of things to the inside of the trailer.  Maybe NuCamp might have changed things a bit now that "all sorts of things" are built into the trailer. But, the wire runs into the trailer from the tub/junction box back to the WFCO area were pretty tiny.  Size of your thumb tiny.  Which was perfectly fine for a bundle of small gauge wires.  Owners who have tried running larger cables back there found it a puzzle.  (It has worked for some).  Some owners have simply run wires under the trailer, above the coroplast, and drilling holes in the WFCO area for the cables. 

This thread discusses it a bit, and I know there is another thread with more info. 

https://tab-rv.vanillacommunity.com/discussion/17943/dc-to-dc-charger-wiring-2022-t-b-320-boondock

This is the thread from 2015 that first discussed the idea of drilling holes and conduit under the trailer.

https://tab-rv.vanillacommunity.com/discussion/2033/running-a-wire-from-battery-to-inside-t-b/p1

This thread has more info.  "AldebaranJill" ran cables along the frame rails of the trailer above the coroplast.  ScottG's comments and pictures show how tiny the areas are to work with.

https://tab-rv.vanillacommunity.com/discussion/4597/running-wires-into-t-b