Either 12 or 14 gauge will be fine.
Bobby
> Wire is never to big.
>
>
>> I am wiring my 01 Tundra as a tow vehicle. My question is what size
>> of wire should I make the charge line. I have an inline switch that
>> will cut off the charge line when the tow vehicle's engine is off.
>> Also have a 30 amp breaker for the line. I will have at least 4
>> batteries in my caravel. I was thinking about a #8 wire. However,
>> this will be choked down going through the 7 wire rv connector. The
>> batteries will be on the tongue of the 69 caravel. Estimate 12 ft of
>> line from the pigtail to the batteries. Also was connecting the
>> charge line directly to the battery. Anyone see any problems. Always
>> best to check.