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Why not use a common ground?
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<blockquote data-quote="MrGiggles" data-source="post: 473452" data-attributes="member: 22613"><p>Mostly because boats are often laid out with several batteries that are isolated, with each designated to certain components. One for the trolling motor, one starting motor, and sometimes another for accessories, to avoid drawing down the other two.</p><p></p><p>Most of the time accessories are wired to a switch/fuse panel and a ground bus bar, not right to the battery, and the batteries are usually close by, so it doesn't save a whole lot of wire.</p></blockquote><p></p>
[QUOTE="MrGiggles, post: 473452, member: 22613"] Mostly because boats are often laid out with several batteries that are isolated, with each designated to certain components. One for the trolling motor, one starting motor, and sometimes another for accessories, to avoid drawing down the other two. Most of the time accessories are wired to a switch/fuse panel and a ground bus bar, not right to the battery, and the batteries are usually close by, so it doesn't save a whole lot of wire. [/QUOTE]
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Why not use a common ground?
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