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I am going to run two amps...the 2 ch amp has a fuse rating of 30A x 3....the 4 ch amp has a fuse rating of 20A x 3. Based on the above this is what I came up with.
4 awg wire from the battery to an in line fuse rated at 150 amp, then to a distro block with a 100 amp fuse to an 8 awg wire to the 2 ch amp, and a 60 amp fuse to an 8 awg wire to the 4 ch amp.