what size wires to use?

[jcarnevale]

Hi,
Restoring a 65 Safari. Installed a new Progressive Dynamics electrical box with 12 Volt and 120 volt in all one box. I have a few questions about 12 volt side.
I have six 12 volt circuits. What size ground wire to I install from the 12 volt ground bar to the negative battery. The battery is about 8 feet away.
Also what size positive and negative wires do I use from the battery to the 12 volt side of the electrical box which is about 10 feet apart.
The 12 volt circuits are all 15 amp and 12 gauge wire.
Joe

[markdoane]

Use #4 AWG and a 50a circuit breaker.

[68 Overlander]

For the 12 volt ground, I would use 8 ga solid copper to the frame.
For the battery connections Pos and Neg, 6 ga is adequate but you never go wrong going bigger because there will be some voltage drop, although not much in that short run. You never said what size converter you installed.