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Car Audio Help
Wiring, Electrical & Installation
Wire size and fuse.
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<blockquote data-quote="urshurak776" data-source="post: 8247719" data-attributes="member: 659190"><p>According to Crutchfield: Q: How big should the fuse be?</p><p></p><p>A: If you're installing just one amplifier, the fuse at the battery should simply match or slightly exceed the fuse rating of the amplifier itself. Some amps don't come with onboard fuses — you have to find their fuse ratings in their owner's manuals. If you're installing two or more amplifiers, just add their fuse ratings together and install a fuse rated roughly equal to this sum. Generally, it's better to go slightly higher than lower, but a margin of five amperes is acceptable.</p><p></p><p>Say you have three amplifiers, two with fuse ratings of 20 amps each and one with a fuse rating of 25 amps. In this case, you can safely go with either a 60 or 70 amp fuse. Of course, if your system is powerful enough to demand that you install a heavy duty fuse, it's important that your power and ground wire be of an appropriately heavy gauge as well.</p><p></p><p>So, they AND you are wrong. I really don't appreciate your condescending attitude.</p><p></p><p>Mutant dreams, I appreciate your response. Makes sense.</p></blockquote><p></p>
[QUOTE="urshurak776, post: 8247719, member: 659190"] According to Crutchfield: Q: How big should the fuse be? A: If you're installing just one amplifier, the fuse at the battery should simply match or slightly exceed the fuse rating of the amplifier itself. Some amps don't come with onboard fuses — you have to find their fuse ratings in their owner's manuals. If you're installing two or more amplifiers, just add their fuse ratings together and install a fuse rated roughly equal to this sum. Generally, it's better to go slightly higher than lower, but a margin of five amperes is acceptable. Say you have three amplifiers, two with fuse ratings of 20 amps each and one with a fuse rating of 25 amps. In this case, you can safely go with either a 60 or 70 amp fuse. Of course, if your system is powerful enough to demand that you install a heavy duty fuse, it's important that your power and ground wire be of an appropriately heavy gauge as well. So, they AND you are wrong. I really don't appreciate your condescending attitude. Mutant dreams, I appreciate your response. Makes sense. [/QUOTE]
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