What size fuses to run to amps.....

[hot_GAGT]

Hey all. I am running a Rockford Fosgate 750S 2-channel to my subs and an Eclipse PA5422 4-channel to the rest of the system. I have my distribution block fed and fused from the battery but I am also gonna fuse each amp between the distribution block and the amp. How do I know what to fuse them at? Is it is the specs or is there a general rule of thumb that I don't know about? Any help would be greatly appreciated. Thanx.


Ben.

[matts]

how ever big the fuse is on the amp itself. now why are you wanting to put yet another fuse on it? you dont really need one. since you're running 2 amps i would put one big (the sum of the 2 amps fuses added together) within a foot of the battery, run the power wire back to a distribution block in the trunk, have one fuse for each amp that's as big as the fuse on the amp.


in other words if both your amps have a 50 amp fuse you'd need a 100 amp fuse right by the battery, then when you split the wire to go to each amp at the distribution block you'd step down to a 50 amp fuse. :) hope that helps.

[dutch]

See thats one thing i dont understand and its hard to get a clean cut answer.

Like, like in my case I have RF 2 guage power wire and a RF 200 amp ANL fuse at the battery, then goes to my 2 farad cap.

I think from what im running for a fuse up front is sufficient, as the fuses on my amps combine to 120amp ( 4 x 30 )

But wouldnt a fuse that is too small, act like a 'bottle neck" ? Considering the wire thickness and the load.

Does this make aaaaaaaannnnnny sense.

[matts]

so all your fuses add up to 120 amp and you've got a 200? big no no. that means it's going to be harder for that fuse to blow in case it needs to for whatever reason. in turn that COULD, not necissarily will, harm your equipment. if you've got 120 i wouldn't go over 125....130 tops. and if you're fuse is too small it's gonna head south too easily.

if you had to either go too big or too small i'd go with too small. the fuse would blow faster, but it would also prevent the equipment from possible harm