need a little wiring help info

[dkguitarist 5,000+ posts]

well i'll be recieving an orion 2500d in a couple days. i also have a diamond d3 400.2 amp. i had a question on fuse size. i am currently running 4awg wire BUT I WILL BE RUNNING 1/0 SOON. anyways, so i have a 200amp breaker under the hood. then i will be splitting off the 4 gauge to a distro running 2 runs of 4 gauge as well, but what size fuses should i have on the distro for the 2 wires. both will be running to the orion (~1400@3ohms for a 13w7). 2 75A anl fuses or would 2 100A fuses work? then i'll do another run of 4 gauge to the d3 with a 40amp fuse for extra protection (d3 has an onboard 40a fuse). need a little help figuring this out. thanks.

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[johnecon2001 5,000+ posts]

fuse to the max of 4awg. 150a each. I would use a 200-350. under the hood for the 1/0awg.

 

[dkguitarist 5,000+ posts]

thank you. i didn't kno if i could fuse it like that or not. but my 4 gauge should be fine for now til i get some 1/0 in a couple weeks? is my 200amp breaker ok for the wire and current ratings?