I'm using 3 amps and from the reading I've done lately I've gathered that b/c of the total draw between the 3 I should use a fused dist block VS a non-fused block in addition to the front main fuse. But one thing I haven't been able to find details on is the fuses themselves!?

There are 3 outputs on the block and each gets its own fuse. Should all 3 fuses be the same size/amps? Or should I use each fuse based specifically on what amp that line of the block is going to? The amps are a 30, 60, and 80. Best off to run them just like that or same sized fuse across all?

 

You will need a fuse less than 18" from the battery to prevent against shorts in the long run of 1/0 gauge running to the fused block. This fuse should be rated at least the sum of all 3 fuses in the dist. block.

(30 + 60 + 80) = 170 amp fuse. Means you must have at least 1/0 gauge going from the battery to the distribution block. Jesus.

The dist. block should contain fuses rated at what each amplifier needs, and you should ensure that each run of wire from the fuse block to the amps can handle the amount of power going through them.

You can probably get away with 8 gauge for the 30 and 60 amp ones, but i'd recommend 4 awg for the 80 amp one. Check out http://www.crutchfield.com/installgu...ble_gauge.html for more info on this.

You only really need a fused distribution block if you are using a smaller gauge of wire after the block (a smaller wire can't hold as much power as a large one, so it can overheat and cause a fire). In your situation, it would be desirable to use this setup, as running 1/0 awg everywhere will be a serious pain in the *** and a waste of money.

On a related note: With a power consumption of 170 amps (holy ****!) you will have to upgrade your alternator and battery probably too.