fuse amp?

DYohn, I knew that formula already. Thanks for posting it again, though, for those who may not have known. But if I'm hooking up 3 amps, one with a 100A fuse (1000W RMS), one with a 30A fuse (30W RMS x2), and the last one with 2 30A fuses (30W RMS x 4), are you saying all I need to use for an inline fuse from the battery is roughly 90-95 amps?

For your main power, you will need to add up all your amps to determine the total load.  You ave listed 1000W + 30W X2 + 30W X4 = 1180 watts total.  Divided by nominal 12 volts = 98.33 amps.  This should be the total load when all amps are running at maximum RMS power (assuming the RMS ratings listed by the amp manufacturers are accurate.)  Use a slow-blo 100A fuse in your main feed at the battery.  The fuses in the amps are designed to protect them from over-excursion when hitting momentary peaks.  If you end up blowing the main fuse, you are probably over-driving the amps or the ratings are wrong.

Thanks for the info.

The wiring kit I bought came with a 250A fuse. I guess that would be way to high to use in my setup

Yeah, the kit is a 0 GA. kit, for up to 3400 Watts (from Stinger). Came pre-packaged with a 250A fuse. I actually bought a seperate 200A fuse to use instead because I thought 250A would be more than I needed.

Thanks for all the responses, guys. This is really helping me out a lot

always use the least amount of fuse needed.   It is OK to have a 250 amp fuse but if you can help it, use the rated fuse for your amp draw.  Better safe than sorry....