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Wiring, Electrical & Installation
fuse on power connestion
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<blockquote data-quote="n2audio" data-source="post: 8949" data-attributes="member: 540940"><p>Now I'm no electrical know-it-all, but appearently, Wizard, you're trying to come across as though you know exactly what you're talking about...sorry, but you're just plain wrong. I would like to know where you gained your mastery on the subject. I could try to dissect this comment by comment but there is a huge amount of misinformation and I don't have the time, and to be perfectly honest, I don't have the expertise.</p><p></p><p>Kris, please don't take Wizard's advice, hopefully zane and some of the other halfway respected people on the forum can lay down the law for you.</p><p></p><p>Just do this and you'll be fine.</p><p></p><p>Add the total rms of your system.</p><p></p><p>Double it.</p><p></p><p>Divide by 13.8</p><p></p><p>That is your current requirement.</p><p></p><p>Use this chart to pick your wire ga. requirement.</p><p></p><p><a href="http://www.crutchfield.com/S-B3wf08j24HN/infolib/carindex.asp?id=cable-length-image" target="_blank">http://www.crutchfield.com/S-B3wf08j24HN/infolib/carindex.asp?id=cable-length-image</a></p><p></p><p>Use as small a fuse possible, if the wire will carry, for example, 100-125 amps, use a 100 amp fuse.</p><p></p><p>Or if your system only requires 80 amps but your wire is capable of carrying 100, then fuse with 80A, it's just a safety factor and there's no reason to have a surplus b/c fuses already allow for short bursts of high current.</p><p></p><p>The fuse on your power wire is ONLY there in case your wire accidentally comes in contact with ground. It DOES NOT and CAN NOT protect your equipment, except for the fact that it will keep your car from going up in flames in case of a dead short.</p></blockquote><p></p>
[QUOTE="n2audio, post: 8949, member: 540940"] Now I'm no electrical know-it-all, but appearently, Wizard, you're trying to come across as though you know exactly what you're talking about...sorry, but you're just plain wrong. I would like to know where you gained your mastery on the subject. I could try to dissect this comment by comment but there is a huge amount of misinformation and I don't have the time, and to be perfectly honest, I don't have the expertise. Kris, please don't take Wizard's advice, hopefully zane and some of the other halfway respected people on the forum can lay down the law for you. Just do this and you'll be fine. Add the total rms of your system. Double it. Divide by 13.8 That is your current requirement. Use this chart to pick your wire ga. requirement. [URL="http://www.crutchfield.com/S-B3wf08j24HN/infolib/carindex.asp?id=cable-length-image"]http://www.crutchfield.com/S-B3wf08j24HN/infolib/carindex.asp?id=cable-length-image[/URL] Use as small a fuse possible, if the wire will carry, for example, 100-125 amps, use a 100 amp fuse. Or if your system only requires 80 amps but your wire is capable of carrying 100, then fuse with 80A, it's just a safety factor and there's no reason to have a surplus b/c fuses already allow for short bursts of high current. The fuse on your power wire is ONLY there in case your wire accidentally comes in contact with ground. It DOES NOT and CAN NOT protect your equipment, except for the fact that it will keep your car from going up in flames in case of a dead short. [/QUOTE]
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