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post #1 of Old 11-07-2007 Thread Starter
scosch
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Sizing battery cables

What is the general rule of thumb for sizing battery cables? Does one use the amperage draw of the starter (which I cant find either for my Westerbeke 21) and then use the standard 3% voltage drop tables for cable length or does one need to consider the in-rush amperage which Calder suggests could be hundreds of amps for a brief period? Calder suggests fusing the cable at 150% of cable ampacity but what size (and therefore what ampacity) cable does one use other than bigger is better.
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