380 Amps of what?
My 2500 HD has two alternators with an advertised output of 380 Amps DC. My truck has a fuse that is rated at 30 A powering the 12VDC output wire on the trailer wiring plug. If I want to utilize t...
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You will need very large wire to the rear of the truck, a very large connector (like the Anderson pictured), and very large wires on the RV side to the batteries.
What batteries do you have? It it's a fairly normal sized bank of around 200 AH then most current you could reasonably hope to put into them is probably about a C/5 or 40 amps. If you assume the truck wiring is 25' and the RV wiring is 10' then you need wiring to carry 40 amps that distance with minimal voltage drop. By my calculations something around 250 MCM would give you just over 1% of voltage drop.
This size wire is huge for RV work. So, basically, the biggest wire you can manage to afford and install.
What batteries do you have? It it's a fairly normal sized bank of around 200 AH then most current you could reasonably hope to put into them is probably about a C/5 or 40 amps. If you assume the truck wiring is 25' and the RV wiring is 10' then you need wiring to carry 40 amps that distance with minimal voltage drop. By my calculations something around 250 MCM would give you just over 1% of voltage drop.
This size wire is huge for RV work. So, basically, the biggest wire you can manage to afford and install.
