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  #11  
Old 04-04-2014
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Re: Fusing Batteries

Thanks Maine Sail. On the ground side. In the USE Switch setup, do I run a common negative cable between the house and reserve batteries in addition to a negative run to the Engine ground?
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Re: Fusing Batteries

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Thanks Maine Sail. On the ground side. In the USE Switch setup, do I run a common negative cable between the house and reserve batteries in addition to a negative run to the Engine ground?
Yes house>start>engine neg are all tied together. The only time this would get tricky is if you needed a shunt for the house ban for a battery monitor.
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Old 04-07-2014
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Re: Fusing Batteries

Ok, *hopefully* one last question on fusing. I will have 200a terminal fuses on each battery, currently I will have 1AWG wire from house battery to 1/B/2 switch, and 4AWG from backup battery (it's what I have at this point, but will eventually upgrade to 1AWG). Will add echo charger connected at switch 1 & 2 posts per suggestion.

Starter cable will run from Common post on switch, currently 4AWG, also to be upgraded to 1AWG. AM I good to connect the starter cable without an addition fuse, on the assumption that the terminal fuses will protect the circuit from battery to starter in case of a short? I'm struggling with determining which fuse type to use and how to mount if I DO fuse the starter cable.
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Re: Fusing Batteries

If you are looking to upgrade the 4 gauge wiring, I recommend genuinedealz.com for custom battery cables. The quality and price are both excellent, and I used the savings to upgrade the cable gauge a bit (both batteries now connected to the switch with 2/0)

Note that although your starter is 75A continuous, there will be a surge of higher current to get the engine turning over. This is when voltage drops in the cable can be noticable if the wiring gauge (or connections) are marginal. BTDT.
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Thumbs down Re: Fusing Batteries

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Originally Posted by tatracy View Post
Ok, *hopefully* one last question on fusing. I will have 200a terminal fuses on each battery, currently I will have 1AWG wire from house battery to 1/B/2 switch, and 4AWG from backup battery (it's what I have at this point, but will eventually upgrade to 1AWG). Will add echo charger connected at switch 1 & 2 posts per suggestion.

Starter cable will run from Common post on switch, currently 4AWG, also to be upgraded to 1AWG. AM I good to connect the starter cable without an addition fuse, on the assumption that the terminal fuses will protect the circuit from battery to starter in case of a short? I'm struggling with determining which fuse type to use and how to mount if I DO fuse the starter cable.
Bumping back up on inquiry regarding fusing the starter cable at the 1/2/B switch.
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Re: Fusing Batteries

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Bumping back up on inquiry regarding fusing the starter cable at the 1/2/B switch.
No need for additional fuse..
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Old 04-11-2014
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Re: Fusing Batteries

Thank you all for the help with this


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