replacing fuse

[kirby mane]

I just ordered an Ap1800d it comes with a in-line fuse do I add that to the one that I already have?

[heebs 09gts]

You just need 1 fuse, the fuse should be rated for whatever size the wire is. Unless the amp does not have onboard fuses, then you would fuse it for whatever the amp recommends.

[kirby mane]

it comes with a fuse and i already have a 120 amp fuse at the battrey do i use both? and i'm using 0 guage wire.

[goingdef]

No your good hook it up!

[goingdef]

Second thought if the amp is 1800 rms and you already have 0g. Then You will need a bigger fuse more like 200amps minimum or it's either going to pop or slowly melt.

[gckless]

The fuse at the battery is there to protect the wire. Fuse based on wire capacity. Go with a 250A.

[kirby mane]

200 or 250 about to order now thanks don't want to go too high and mess something up or would a cicuit breaker be better?

[gckless]

Circuit breakers and fuses are two different things, though they do the same essential thing. I use fuses. Use 250A for CCA wire, 300A for OFC wire.

[kirby mane]

ok thanks