[rpmerf]

I have a 30 amp fuse right after the battery. The only time it ever popped was when my voltage regulator died. I do have a mostly factory truck, so even with lights, radio, and HVAC running, I should be around 30 amps. With the factory setup, the power will pull from the generator instead of the battery, since the generator is located between the battery and the fuse block. The only thing going to the battery should be for charging the battery.

I have considered putting a big fuse right after the alternator. Some food for thought. Say your alternator wire hits the header and burns through. The fuse on the battery should pop right away. Once you shut the engine down, the alternator is no longer supplying power.

This does also depend on exactly how you have it wired. If you have the alt on the passenger's side, wired to the starter, then I would be much more inclined to have a fuse. I believe OEMs use a fuseable link between the alternator and battery. I'm pretty sure that's how it is on my 97 Suburban with a 140 amp alternator.