windowtinter
ok stopped by the metal shop and im waiing on a price for 1.5" by 3/8" thick copper bar but my question is if this is thick enough or do i need to 1/2" thick?it will be quad 260 alts 4 battcap 4000 and 2 3000 4 runs of power and ground.
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Master Yoda
That should work fine! I am only using 1/4" by 1" wide alum. for my setup.
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Bill Wolf
I found a formula that rated the current capacity of bus bars. Its Thickness X Width X 1000 for copper or 700 for aluminum.

That would rate your bar at about 562 amps. So you would double that for your negative and positive bar. Gives your ruffly 1124 amps of capacity in those bars.
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