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Big 3 upgrade for 2021 Ford F150....Fuse or not to fuse?
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<blockquote data-quote="HardofWhoring" data-source="post: 8842993" data-attributes="member: 674149"><p>Yes. Your factory alt to batt wire, should be a 'fusable link' (or at least it is on my vehicle, but were different makes and many years apart). You may not see it fused, but a fusable link will burn through the wire if it exceeds its limits, but it doesn't burn through the sheath/casing so that it won't create a hot circuit. </p><p></p><p>Fuses are added to create a weak point in the circuit where it can be protected, and fixed easily. Fuses need to be capable of handling more than what the alt (/load) is, but less than the capability of the wire. You are adding it in because if your alt goes bad and overcharges it will burn through that wire. </p><p></p><p>If you fuse it and it burns through, then you just don't charge your battery. You have also protected where it will burn through so there is no risk of that wire flopping around and contacting something that can burn your truck down. With that size of amperage, it would fuse together quick, melt together so fast, you might be sitting in the cab, and not be able to save the vehicle. If you add a fuse, and your alt goes nuts, then your battery drains slowly until you replace the fuse and fix the alt.</p></blockquote><p></p>
[QUOTE="HardofWhoring, post: 8842993, member: 674149"] Yes. Your factory alt to batt wire, should be a 'fusable link' (or at least it is on my vehicle, but were different makes and many years apart). You may not see it fused, but a fusable link will burn through the wire if it exceeds its limits, but it doesn't burn through the sheath/casing so that it won't create a hot circuit. Fuses are added to create a weak point in the circuit where it can be protected, and fixed easily. Fuses need to be capable of handling more than what the alt (/load) is, but less than the capability of the wire. You are adding it in because if your alt goes bad and overcharges it will burn through that wire. If you fuse it and it burns through, then you just don't charge your battery. You have also protected where it will burn through so there is no risk of that wire flopping around and contacting something that can burn your truck down. With that size of amperage, it would fuse together quick, melt together so fast, you might be sitting in the cab, and not be able to save the vehicle. If you add a fuse, and your alt goes nuts, then your battery drains slowly until you replace the fuse and fix the alt. [/QUOTE]
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Big 3 upgrade for 2021 Ford F150....Fuse or not to fuse?
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