Why did my in-line fuse melt?

Question

my in-line fuse has melted on my 8-gauge power cable. the cable is hooked to a pioneer 760 watt amp that pushes two 10 inch kicker's at 350 max power for each sub. (150 rms for each sub also). it's been fine for a week but the system wouldn't come on today and i noticed the melted fuse. what should i do?

Answer 1

Let's see, 700 watts for the kickers, and 300 for the subs.

You're running a kilowatt through that power cable, of course the fuse is going to melt.  Without the fuse, the cable could heat up and set fire to your car.

Answer 2

Replace the darned fuse of course!

Be sure to use the same amperage rated fuse.

Why it blew you ask?

Because the system drew more amperage than the fuse was rated for.

8 guage for ~300 constant is just fine... As long as the cable isn't too long ;)

To Computer Guy:

You misunderstood what he wrote.

There is only 300watts constant going through that power cable.

Answer 3

only two reason for that

you need a higher rated fuse (too small for the wire) or you had a short (the wire touched metal)