Battery cable size

I made up my own with welding cable (available by the foot at any welding supply place and crimp on solid copper lugs, also available at the welding store.

Same as the main RV cable connection. Probably #6.
I recommend the main ground to one battery and the main positive to the other.

Pro looking custom cables here:
http://www.genuinedealz.com/custom-cables?size=56

Most battery studs are 5/16" to get the right lug.

I agree with Time2roll.

You can get away with 1/2 the size of the trailer feed, assuming we're talking about 12v batteries.

Bigger is better, go with the Welding cable...

Don & Barb Bogue wrote:
Bigger is better, go with the Welding cable...

Sure, 4/0 should do it.

The same size and what comes out of the trailer and hooks to the battery now. Wire them as time2roll suggested so they will charge and discharge evenly. This will make the advice of 2oldman incorrect when wired this way.

I used # 4 batt. cable available by the foot from NAPA. $12 for 2 10" cables plus ends which I soldered on or buy solder pellets from NAPA also, it's easier.

When you hook up the trailer connections to the batteries connect the positive to one battery and ground to other battery, it utilizes the batteries power better. Search internet about it.

Same as the trailer or larger. Welding cable would work fine as long as you can make solid connections.

Happy Camping!

Thanks for all the responses, I ordered #2 red and black cables. Now the fun begins trying to bend this stuff.