Originally posted by Dr. Isotope
If you want to know why you're blowing fuses, don't look to the wire-- voltage drop doesn't blow fuses.
hehe...must have been all that spray glue I've been inhaling while working on the car....
yes, wire size doesn't contribute to broken fuses - I really didn't intend to say that. Essentially a broken fuse means that you are asking for more current then the fuse will pass. This could be because of a short, or because the amps are thirsty.
At full tilt, your 1200.1 will draw 120A - but because of the duty cycle of music, you will rarely hit that unless you are doing burps or sine sweeps.
My point is that I don't find even 0.7V of drop acceptable simply due to the internal resistance of the wire. (one reason I'm running 0/1 in my car
). I would suggest you select a 120A fuse and go from there. I'd consider, at that length (approx 12 feet) that 4 ga is safe to around 120A (don't know where 100A came from either...inhaling glue is bad m'kay
).
Then again, I always err on the side of caution - wire is cheap.