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<blockquote data-quote="loopkiller" data-source="post: 5836224" data-attributes="member: 601690">Actually the same exact wiring would still apply, it would just be that WIRE 2 and WIRE 4 would be much longer. Also, the distribution block would become more logical with a multi amp setup.Yes, most 1/0 awg wire I have seen is rated to 300A, so all fuses on 1/0 awg wire should be 300A fuses. The only time this would change is if your wire was rated something other than 300A.First things first, always fuse based on the wire capacity rating. You choose the wire based on the current draw, then fuse based on the capacity of the wire. So in your case, you have a 250A alt, you will need 1/0 awg wire, and 1/0 awg wire is usually rated up to 300A, so you will need a 300A fuse.There are some differing opinions on fusing the alt charge wire. I usually choose to play things safe and fuse every wire that connects to a POS+ battery post. For this wire, I would fuse as close to the battery as possible. An additional fuse at the alt end is another possibility. We have had some discussions here on the board about that extra fuse and we have not found a sound conclusion IMHO. That topic is still up for discussion.</blockquote>

[QUOTE="loopkiller, post: 5836224, member: 601690"] Actually the same exact wiring would still apply, it would just be that WIRE 2 and WIRE 4 would be much longer. Also, the distribution block would become more logical with a multi amp setup. Yes, most 1/0 awg wire I have seen is rated to 300A, so all fuses on 1/0 awg wire should be 300A fuses. The only time this would change is if your wire was rated something other than 300A. First things first, always fuse based on the wire capacity rating. You choose the wire based on the current draw, then fuse based on the capacity of the wire. So in your case, you have a 250A alt, you will need 1/0 awg wire, and 1/0 awg wire is usually rated up to 300A, so you will need a 300A fuse. There are some differing opinions on fusing the alt charge wire. I usually choose to play things safe and fuse every wire that connects to a POS+ battery post. For this wire, I would fuse as close to the battery as possible. An additional fuse at the alt end is another possibility. We have had some discussions here on the board about that extra fuse and we have not found a sound conclusion IMHO. That topic is still up for discussion. [/QUOTE]

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