Fuse Size...

[94CamryBumpin 10+ year member]

I will be running 1/0 ga. from battery positive back to a fused distro into a 4 ga. that connects to the amp....my question is, what size fuse should i use for the 1/0 ga. 250A, or 300A...and what about the fused distro? 250A or 300A or smaller? and for the big three battery positive to alternator, i know your supposed to have a fuse towards the battery positive end of the wire....again would i need a 250A or 300A fuse...or would i really need a fuse?

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[94CamryBumpin 10+ year member]

anyone?

 

[flakko 5,000+ posts]

yes you need a fuse...what id do is just get the biggest fuse (300A) can never be too safe. Although i don know how much power yer running.

 

[Prowler573 5,000+ posts]

yes you need a fuse...what id do is just get the biggest fuse (300A) can never be too safe. Although i don know how much power yer running.

I have to respectfully disagree, Flakko...

If you go too far over the necessary fuse amperage then you'll defeat the purpose of that fuse's presense. i.e. ~ if a component would get fried by a 250 ampere spike that 300 amp fuse will neither lessen nor stop the spike from getting through.

I do not, unfortunately, have a definitive answer for what size fuse 94CamryBumpin should use but just getting the biggest one available so it'll be big enough isn't particularly good advice, imo

 

[SPL140.2 5,000+ posts]

Fuse the wires that corresponds to the size of the wire, do a little searching on here and youll find it. Fuses protects the wires and blowing up your battery which could very easily hurt you. Be safe //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

 

[94CamryBumpin 10+ year member]

i've decided since the A3000DB im going to get has a max output of 3000 watts (2300WRMS) im going to get a 250A fuse (because i heard that it was roughly 1A for every 10 watts of power?) for the power wire im gonna run through a distro into the amp with 4 ga. wiring...but i still can't figure out how to decide how big of a fuse to use for the big three alternator to battery positive?

 

[SPL140.2 5,000+ posts]

i've decided since the A3000DB im going to get has a max output of 3000 watts (2300WRMS) im going to get a 250A fuse (because i heard that it was roughly 1A for every 10 watts of power?) for the power wire im gonna run through a distro into the amp with 4 ga. wiring...but i still can't figure out how to decide how big of a fuse to use for the big three alternator to battery positive?

Again use the fuse according to the wire size, 250Amps is excellent for the power wire 1/0 guage remember the fuses doesnt protect the equipment it protects the wires and the battery //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif For the big three if your using 1/0 guage use a 250amp fuse.