Block fuses?

dBincognito · Post by **dBincognito** » Sun May 03, 2009 3:26 pm

dako wrote:running 4ga power wire, i have a 150amp fuse within 12 inches of the battery and then after the distribution block, have an 80amp and a 60amp mini fuse for each amp respectively within 18 inches (in my case within 10 inches) of each amp. i've never had an issue with overload, fuses blowing or amps going into protection mode.

i would also think that unless this guy has a 150 or 200 amp alternator, his amp(s) will realistically never see the amperage or a spike that the inline fuses are designed to handle in the first place.

PERFECT...WE FL BOYS KNOW HOW TO DO IT

If he has extra batteries he might....otherwise...you're right

dBincognito · Post by **dBincognito** » Sun May 03, 2009 3:34 pm

ttocs

why 18 inches from the amp?

Electricity travels along the shortest easiest path.....if you have a problem near the amp...do you think the shortest path is going to be to travel all the way back up to your inline fuse ?
No, the shortest path will be to fry all of your amps

The fuses built into the amp(if any) will melt in about a half second....then your power supplies in the amp will be fried....and shortly following, say good bye to your MOSFETS

dako · Post by **dako** » Sun May 03, 2009 4:07 pm

dBincognito wrote:
dako wrote:running 4ga power wire, i have a 150amp fuse within 12 inches of the battery and then after the distribution block, have an 80amp and a 60amp mini fuse for each amp respectively within 18 inches (in my case within 10 inches) of each amp. i've never had an issue with overload, fuses blowing or amps going into protection mode.

i would also think that unless this guy has a 150 or 200 amp alternator, his amp(s) will realistically never see the amperage or a spike that the inline fuses are designed to handle in the first place.
PERFECT...WE FL BOYS KNOW HOW TO DO IT

If he has extra batteries he might....otherwise...you're right

haha

yeah, i've always been told, even if an amp has fuses, or is internally fused, pretend they don't even exist. hell, i even put a 1amp inline fuse for the power on my line driver. can never be too cautious...

Post by **ttocs** » Sun May 03, 2009 6:49 pm

learned something new today.

Is that a rule in any of the competition arenas?

baddog671 · Post by **baddog671** » Mon May 04, 2009 7:53 am

You guys make my head hurt, but I think I'll be able to figure something out...

baddog671 · Post by **baddog671** » Mon May 04, 2009 8:07 am

dBincognito wrote: you need 1....under the hood....then another within 18 inches of your amps

You fuse according to the amperage that will be drawn....what is the total rated RMS power for the system?

The in-line fuse attaches literally TO the battery terminal, so it is definitly within that range. I plan on putting the block about 8-10" from the amp

Amp -1200RMS, Sub- 500RMS/900MAX

This means u run a 50mm² wire with an inline fuse of 200Amps from your batterie to the distro block! If u got a distro with 2 outputs u should put two fuses with 100Amps in there and run a 25mm² from each output to the two amps u have!

Thanks, that's pretty much what I was looking for. Can these fuses be bought locally?

i would also think that unless this guy has a 150 or 200 amp alternator, his amp(s) will realistically never see the amperage or a spike that the inline fuses are designed to handle in the first place.

Stock alternator in my car is rated at only 130amp...

I think the main confusion came from the fact that I didn't know the fuses were there to "restrict" the flow. Like putting a 100a fuse so it only lets 100a through. I thought if it was too low, that is when you blow fuses becuase it is a higher current going into the fuse...

Post by **ttocs** » Mon May 04, 2009 9:15 am

fuses limit the current by blowing when the current goes over the amperage rating on them.