What size fuse do I use?
Printed From: the12volt.com
Forum Name: Car Audio
Forum Discription: Car Stereos, Amplifiers, Crossovers, Processors, Speakers, Subwoofers, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=40134
Printed Date: May 12, 2025 at 4:59 AM
Topic: What size fuse do I use?
Posted By: mworley
Subject: What size fuse do I use?
Date Posted: October 01, 2004 at 9:28 PM
I bought a used car, 89 Corolla, and it already has the wires needed to install an amp. The red wire, connected to the battery has a place for a fuse. I am installing a 430w amp and a 500w sub. Does anyone know the correct fuse?
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Mike
Replies:
Posted By: stevdart
Date Posted: October 01, 2004 at 9:39 PM
The fuse you use on the wire near the battery is dependant on the gauge of the wire, not the amp rating. Can you tell what size the wire is? Should be a minimum of 8 gauge for that amp, it looks like. Use no more than 80 amp fuse for 8 gauge if you're not sure of the quality of the wire. Or, you can just go a little more than the fuse rating of the amp, whatever that is.
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