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Re: Stereo wizards, i beckon you.
Quote:
Originally Posted by B 4 You
okay. how big of a fuse should i get? and where's the best place to buy one? by big i mean how strong
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The output of your stock alternator is only 95A maximum. The 4 gauge cable is rated at 150A current-carrying capacity. You want a fuse that will blow before that capacity is reached, so a 100A-125A fuse will work.
My recommendation is to use the Mega-Fuse by Littelfuse. These are a slo-blo type which will not fail with a transient electrical spike. Read more about them HERE
They are available through Amazon.com
Mega-Fuses
You will also need the fuse holder HERE
I would use the 125A fuse and see how it performs. If there are no problems, I would go down to 100A for quicker fail response. As you can see by the chart, if a wire shorted, then 100A fuse would blow in .06 seconds and the 125A fuse would blow in 0.1 seconds.
You will also see that these fuses would carry the full output easily before failing.
Look at my alternator wiring configuration HERE. Look around page 6 for the Mega-Fuse. I am using it to protect my 160A high-output alternator, but you can use this to protect the amp as well.
Just run the power cable from the battery through the fuse (which should be as close to the battery as possible) and then to the amplifier.
Also time to beef up the ground wires with the same cable. Are you planning to do the alternator wiring upgrade as well?
Read this article that I developed to take the mystery out of some of this. More information on selecting a power cable and fuse sizing.
Just click ALTERNATOR 101
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Subaru Ambassador
1996 Polo Green LSi #216 ..138,100 miles. ..SOLD
JFICX8659TH100216.....Date of Manufacture: November 16, 1995.....
Fuji Heavy Industries..Ōta North Plant....Ōta City,. Gunma Prefecture, Japan
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