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Old 08-27-2019, 03:45 AM   #15
PNW Fireguy
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Join Date: Nov 2015
Location: Arlington
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M.O.C. #18081
I am assuming that your cable length purchases are close to your actual run lengths? If that is the case I would really try to look at your layout o shorten the 2/0 runs. If you can keep them around 5’ for both the + &- runs you will have better results when done.

Your battery negative to your shunt is sized at 2/0. Then from the shunt to the negative bus bar is also 2/0. The bus bar to frame ground only needs to be a #4 I believe. This should be the only bonding point. Don’t forget the equipment grounding conductor for your inverter as well. The size should be noted in your inverter documentation. Probably a # 8 or 10.
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