Wiring Diagram Needed-1 Engine, 2 Switches, 3 Batteries - Page 2 - SailNet Community
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post #11 of 20 Old 09-16-2010
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In general, the fuses are sized to protect the wiring. Unless you know the distance run and the gauge, you won't really have a good idea of what size fuse to use. As for the bus bars, that is pretty much determined by the size of the DC circuit breaker panel you're using.

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post #12 of 20 Old 09-16-2010
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Fuse sizing isn't critical as you are fusing for a short circuit and not overload. Anywhere from 100% to 150% of the wire rating. Here's a link that should help. Scroll down about halfway.
Choosing Circuit Protection - Resources - Blue Sea Systems

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post #13 of 20 Old 09-17-2010
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Yup...without knowing the run length and rough amperage load, there's no way to determine what size wire is being used or what the fuse size should be... need to get more info first.

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Fuse sizing isn't critical as you are fusing for a short circuit and not overload. Anywhere from 100% to 150% of the wire rating. Here's a link that should help. Scroll down about halfway.
Choosing Circuit Protection - Resources - Blue Sea Systems

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post #14 of 20 Old 09-17-2010
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i picked up the boatowners illustrated electrical handbook last week. I'm about halfway through and its helped a lot. isbn 978-0-07-144644-0

i also picked up a good quality clamp ammeter. so now i can check to see if something is working without pulling it off and dragging it to the electrical place.

the PO of my boat had her wired for 16 batteries in 4 seperate banks with redundant everything... so i have a lot of learnin to do.
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post #15 of 20 Old 09-17-2010
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Just how big a boat are we talking about? 16 batteries in FOUR HOUSE BANKS is really stupid and requires a really big boat.
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i picked up the boatowners illustrated electrical handbook last week. I'm about halfway through and its helped a lot. isbn 978-0-07-144644-0

i also picked up a good quality clamp ammeter. so now i can check to see if something is working without pulling it off and dragging it to the electrical place.

the PO of my boat had her wired for 16 batteries in 4 seperate banks with redundant everything... so i have a lot of learnin to do.

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her going when she oughta fall down, tells you she's hurting 'fore she keens. Makes her a home.

—Cpt. Mal Reynolds, Serenity (edited)

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post #16 of 20 Old 09-18-2010
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4 house banks - it would be interesting to see how they are charged.

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post #17 of 20 Old 09-18-2010
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Quote:
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Just how big a boat are we talking about? 16 batteries in FOUR HOUSE BANKS is really stupid and requires a really big boat.
i have a 45' starrett jenks. that setup was from the guy who built the boat in the late 70's. i inherited the boat with two banks hooked up, one side with 2 12v group 27's and 2 6v gels on the other side...

on a side note, i have a smart regulator v2 from ample power company... anybody know where to find schematics for it???
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post #18 of 20 Old 09-18-2010
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Try Ample Power. Ample Power Manuals and Wiring Diagrams

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post #19 of 20 Old 09-19-2010
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Take a look at genuinedealz.com for the wire--you will save a bundle over buying at your chandlery.
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post #20 of 20 Old 09-24-2010 Thread Starter
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genuinedealz.com is definitely some of the cheapest and they sell on eBay too :-) I'm going out tomorrow to start measuring cable lengths.
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