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<blockquote data-quote="Roland" data-source="post: 8242539" data-attributes="member: 647142">Thank you.&quot;Fusing too small can cause unwanted resistance causing the fuse holder to melt than defeating the purpose of having fuses in the first place.&quot;I think this is were the confusion comes in. I can&#039;t for the life of me see how this statement can possibly be true. (but if that is your experience...) I guess we will just have to disagree on this.I have only repeatedly seen the exact opposite. I&#039;ve seen and repaired many melted wires ... but only when a fuses that was to big was used, or no fuse at all. The only way i know that you will melt a fuse holder is if you put in a fuse that is higher (a bigger fuse) than the holders rating.Putting in a smaller fuse dose not increase resistance of the circuit in any real way. A fuse can cause a voltage drop as it heats up it a very small drop (like 0.1 volts) until right before it blows.Quote Wiki&quot;In electronics and electrical engineering, a fuse is a type of low resistance resistor that acts as a sacrificial device to provide overcurrent protection, of either the load or source circuit.&quot;Putting a smaller fuse will always protect better. In a electrical system a inline fuse not only protect the wire, and everything else down stream of the fuse. But it can also protect the system up stream of it also.Lets say the stock alternator that OP still has in his car is still running his stock 12 gauge wire. He has a short down stream of the fuse. Which is going to burn out faster, the 12 gauge wire, or the 300 amp fuse? So if he uses a 100 amp fuse, not only would that protect his 0ga wire it also protects his 12 ga wire and ...</blockquote>

[QUOTE="Roland, post: 8242539, member: 647142"] Thank you. [B][I]"Fusing too small can cause unwanted resistance causing the fuse holder to melt than defeating the purpose of having fuses in the first place."[/I][/B] I think this is were the confusion comes in. I can't for the life of me see how this statement can possibly be true. (but if that is your experience...) I guess we will just have to disagree on this. I have only repeatedly seen the exact opposite. I've seen and repaired many melted wires ... but only when a fuses that was to big was used, or no fuse at all. The only way i know that you will melt a fuse holder is if you put in a fuse that is higher (a bigger fuse) than the holders rating. Putting in a smaller fuse dose not increase resistance of the circuit in any real way. A fuse can cause a voltage drop as it heats up it a very small drop (like 0.1 volts) until right before it blows. [I]Quote Wiki[/I] [I]"In electronics and electrical engineering, a fuse is a type of [/I][I]low resistance [/I][I]resistor that acts as a sacrificial device to provide overcurrent protection, of either the load [/I][I][B]or source circuit[/B][/I][I].[/I]" Putting a smaller fuse will always protect better. In a electrical system a inline fuse not only protect the wire, and everything else down stream of the fuse. But it can also protect the system up stream of it also. Lets say the stock alternator that OP still has in his car is still running his stock 12 gauge wire. He has a short down stream of the fuse. Which is going to burn out faster, the 12 gauge wire, or the 300 amp fuse? So if he uses a 100 amp fuse, not only would that protect his 0ga wire it also protects his 12 ga wire and ... [/QUOTE]

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