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Location: Vermont | There are two factors that determine the size wire you should use; current and cable length. Current: AWG 4 cable can safely carry 90 amps, which is more than the maximum charge or discharge current your batteries will ever see.Length: Long battery cables can cause a drop in voltage over long distances, even if they are large enough to carry the maximum current. The jumper cable that connects the two batteries in a set like yours is typically less than 2 feet long. At a current of 90 amps the voltage drop across a 2 foot length of AWG 4 cable will be no more than 1%, which is insignificant. Unless you were asking about isolators...that is another answer all together...
Edited by PaulChristenson 2011-01-25 1:08 AM
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battery insulator /electiral question
