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Message: <blockquote data-quote="dumpbeast86" data-source="post: 7959316" data-attributes="member: 645843">Yes, running a frame ground in the back, close to the battery, would be the way I would recommend you do it. As I said, 4/0 isn't necessary, just two equal lengths of that knu you already have, grounded to one spot, is perfect. That 100 feet will be plenty if you do it this way. If you are around 15 volts, with 5000 watts, then-current(amps)=power(watts) divided by voltage(vdc)so:5000/15= about 333 max amps you could be drawing from that particular system.having 4/0 wire that will handle 1200 amps of current will certainly work, but is, obviously, not necessary.</blockquote>

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