question about Fuse/power wire

[kingisback08 10+ year member]

ok so my buddys got his system all hooked up 4gauge power wire for the amp but he was using the only fuse he had around which is 200amp's. will that affect the power flow or what could happen

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[goodguy8705 10+ year member]

It's too big. What kind of wire is it?

It should either be a 120 amp or 150 amp fuse.

 

[kingisback08 10+ year member]

its knu-concepts i think but its 4 gauge for sure. so you think thats hurting his output?

 

[goodguy8705 10+ year member]

No, but it is too large to be useful. Fuses blow to prevent overheating of the power wire from too much amperage. Using a 200 amp fuse on a wire that can't handle 150 amps means that when the wire gets a 175 amp surge, the wire will overheat possible catching fire because the fuse didn't blow.

 

[thegreatestpenn 5,000+ posts]

the wire could be melting and the fuse wouldn't even blow. kinda defeats the purpose of the fuse.

 

[goodguy8705 10+ year member]

Do you know which kind of 4 gauge it is by Knu?

Fleks = 150 amp fuse

Kolossus = 120 amp fuse

KLMX = 100 amp fuse

 

[wasted ink 10+ year member]

I don't think people should be installing equipment if they don't understand how it works. This is how car fires happen.

 

[kingisback08 10+ year member]

its klmx, thanks ill let him know.

 

[canemaster 10+ year member]

wait, I know I'm thread jacking but...

my friend got a Kicker amp install kit and it comes with a 300 amp fuse....

we are using 1/0 awg but only for about 1000-1100 rms watts (hifonics 1606D @ 2 ohms)

fuse useless??

 

[wasted ink 10+ year member]

wait, I know I'm thread jacking but...
my friend got a Kicker amp install kit and it comes with a 300 amp fuse....

we are using 1/0 awg but only for about 1000-1100 rms watts (hifonics 1606D @ 2 ohms)

fuse useless??

Umm, no. A fuse is never useless.

Get a smaller one. 150a will do the trick.

 

[canemaster 10+ year member]

Thank you

 

[05AztecRed 10+ year member]

Umm, no. A fuse is never useless.
Get a smaller one. 150a will do the trick.

What? 150A fuse for a 1/0 wire?

Needs to be MINIMUM 300A fuse...

 

[JimJ 5,000+ posts]

What? 150A fuse for a 1/0 wire?
Needs to be MINIMUM 300A fuse...

Please explain why a smaller fuse is a bad idea. //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

 

[loopkiller 10+ year member]

Please explain why a smaller fuse is a bad idea. //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

If you don't know, use the search button! //content.invisioncic.com/y282845/emoticons/fyi.gif.9f1f679348da7204ce960cfc74bca8e0.gif

I think he has a FS thread selling 300A fuses //content.invisioncic.com/y282845/emoticons/fyi.gif.9f1f679348da7204ce960cfc74bca8e0.gif

 

[wasted ink 10+ year member]

What? 150A fuse for a 1/0 wire?
Needs to be MINIMUM 300A fuse...

No. This is a common misconception. If you understood current flow, the amount of amps 1/0 wire carries, etc, you would realize that a 300A fuse is too big for 1/0 wire. Sure, I know you've read it here a million times, but like I said, it is a common misconception. Instead of believing everything you read on forums, have you ever considered reading a book on electrical? Like JimJ said, explain how a smaller fuse is a bad idea.

As I said in an earlier post, perhaps people should not be installing equipment if they do not know how it works.

For you to say it needs to be a minimum of 300A proves to me that you are very unfamiliar with the way a fuse is designed to work.