Fuse Size

 

Anonymous
 
I have recently upgraded my amp and im wondering if i need to upgrade the fuse at the battery. It is a hifonics bx1500d which has 2 60 amp fuses on it, what size fuse should be at the battery? thanks
 

Silver Member
Username: Byrumjr

Post Number: 132
Registered: Jan-05
What size wire?
 

New member
Username: Dsx

Ottawa, ON CAN

Post Number: 4
Registered: Mar-05
Use 4 gauge wire,40 amp fuse this way if there is any problems the 40 amp fuse will go first and prevent damage to the amp.
 

Bronze Member
Username: Nitescort

Post Number: 30
Registered: Mar-05
100 amp. you will pop that 40 10 times a day.
 

Bronze Member
Username: Nitescort

Post Number: 31
Registered: Mar-05
also...use 2 guage from battery to distribution block atleast. 4 guage is only rated at 50-65 amps over a 13-16 foot run. personally I would use 0 guage if its over a 15 foot run..
 

New member
Username: Dsx

Ottawa, ON CAN

Post Number: 9
Registered: Mar-05
Well I must be doing something wrong because I am using a 40 amp fuse for 2 amps with 60 amp fuses and have had no problems? with 4 gauge wire from front to back, 0 gauge wire is over kill and is only for serious competition systems running sreious bass.
 

Silver Member
Username: Fishy

Tamarac Ft.Laud, FL USA

Post Number: 775
Registered: Sep-04
If you ain't poppin that 40 amp fuse that simply means you haven't pushed much over 500 watts..... yet, but I agree with you about the wire. 4 gauge should be fine for most "daily drivers" if the alternator is up to snuff.

16 ft of 4 gauge at 65 amps corresponds to about a .3 voltage drop. That small of a voltage loss would probably be insignificant in most cases except maybe when running your system with the engine off.

Regardless, unless you're running 8 gauge or something there's no reason why you can't run a fuse at the battery slightly larger than what your amps are rated for. That fuse is there to protect your wiring and car in case of a short, not your amplifiers.

-Fishy
 

New member
Username: Dsx

Ottawa, ON CAN

Post Number: 10
Registered: Mar-05
I agree, but if you have a sudden voltage spike like boosting your car the inline fuse will protect the amp from that spike.
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