Fuse/Breaker Question - Chevy Impala SS Forum
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post #1 of 19 (permalink) Old 01-22-2007, 06:08 PM
mr k gee
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So I fried my amp. I have a battery wires in series to a battery in my trunk. In between the two batts I have my fuse within 12" from the first batt.
Then from my second batt, I am directly wired with no fuse to the amp, as of now (no amp yet)

Do I need a fuse/breaker between the first and second battery? Or can I take my fuse from the first batt and run it between the second batt and my new amp coming?

It is rated at 120amps, and I plan on running another amp thats rated at 80 I think. Should I get a 200amp breaker to run before the amps?
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post #2 of 19 (permalink) Old 01-22-2007, 08:37 PM
1SS2HEAR
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Where are your batteries? If one is in the front and the other in the rear you need both batteries fused in case the wire between them shorts out you want burn up your car. Trust me when I tell you that when even a small wire heats up enough to burn the plastic it will catch the car on fire. I've seen it happen.
post #3 of 19 (permalink) Old 01-22-2007, 08:59 PM
UndercoverPunk
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No offense... but THAT... IS A HORRIBLE IDEA. You actually need another fuse between the batteries. You need one right after the front battery and then another right before the rear battery, if you're not willing to do this you might as well torch it yourself.

Also, you said you had the batteries in series... if you did you would be running 24V...
 
post #4 of 19 (permalink) Old 01-23-2007, 12:47 AM
mr k gee
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lol, my bad...when I post these ideas I am at work and rushing so as not to get caught using the computer...lol

Batts ARE parallel in 12V and one is in the trunk, so I do need to keep my fuse under the hood where it is now...

The question I guess I have is....

Do I need to match the fuse size to the fuses in the amp (120amps)???
Or can I run a 60amp fuse between the batts, and then a bigger fuse after the second battery?

I guess I know my own answers, besides the fuse size between 1st/2nd battery.
post #5 of 19 (permalink) Old 01-23-2007, 12:49 PM
glennSS
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run a fuse big enough to handle whatever the amp can pull. If you have the ability to pull 120 amps, Then put 120 amp fuse wherever you have fuses in line. I have a 200 amp fuse up front and a 120 going to each back battery. Then I have one battery connected to my bass amp and one battery connected to my high amps. Never had a problem. You also want to make sure the cable is big enough to handle the loads you are putting through them.
post #6 of 19 (permalink) Old 01-23-2007, 01:06 PM
mr k gee
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Im running 4awg, and I guess I need to buy at least a 120amp breaker and fuse [img]graemlins/.gif[/img]
was trying to avoid buying more stuff
post #7 of 19 (permalink) Old 01-26-2007, 04:58 PM
UndercoverPunk
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I would use fuses, breakers have occasionally welded closed... not good...

Probably would never happen.... but fuses>breakers in my book.
post #8 of 19 (permalink) Old 01-26-2007, 05:11 PM
mr k gee
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I ended up just getting another ANL fuse holder and 2 200amp fuses...although I think my current ANL holder is for mini.fuse was B1G1free tho
post #9 of 19 (permalink) Old 01-26-2007, 07:58 PM
UndercoverPunk
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on a 4 gauge wire I'd stick with 150A fuses of less to err on the safe side.
post #10 of 19 (permalink) Old 01-26-2007, 10:06 PM
mr k gee
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even with one amp fused at 120 and the other at 80?
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