Here is a nice site about wire gauges and cable lengths carrying loads of 3 to 50 amperes at 6 & 12 volts. ATA wire color & code, recommended cable gauge, wire and cable carrying capacities, auto and boat wiring guide.
It also states that for 6 VOLT use NEXT wire size available.
http://www.crowbarelectricalparts.com/Specifications.htm

Hope it helps


Jim & Caroline
The highway is for gamblers, better use your good sense."
Gooday-that's my 1¢ answer due to the lousy economy ~ cause I ain't got - no . mo . doe

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