Originally Posted by 25FKS
Just like in a chain or tug of war, the weakest link is the source of problems. You have different size wires. They should all be the same AWG. The red positive ones going to the switch and the red positive out of the switch as well as the black negative ones. Also, use as little length as possible - turn both small positives 180 and probably reduce their length 50%.
I had originally planned to use the 2/0 to also run to my charger. I used it as my interconnects since 6v has more voltage drop than 12v.
Now that I've moved my charger to less than 3' of wire run to the batteries I ran 4 gauge. It made all the box connections easier and will do what I need it to do. Would 2 gauge have been better? Sure, but 1 gauge would have been better than that.
The factory 8 gauge carries 12v back to the power center.
It might not be ideal, but it is a vast improvement over what the manufacturer installed.
I also tried every arrangement possible in the box to accommodate everything I wanted to put in and this is the best compromise between connections, serviceability and wire length.
Something to keep in mind and I constantly have to keep my own compulsions in check..... it's an rv, not the space shuttle.
Sent from a field