10/29/2023 0 Comments Running 40 amp fuse in 30 ampOver-fused circuits are often the longest and, at the same time, the most overloaded ones, going to different rooms and floors in the old house. Burning insulation will ignite an extremely dry dust inside your walls and ceiling. Too much current (or too many Amps) would flow through the wire and burn it before the fuse or breaker blows or trips. Over-fusing happens when the rating of the fuse or breaker is too large for the rated ampere capacity (or ampacity) of the circuit it is supposed to protect. If you replace a 15 Amp fuse or breaker protecting a 15 Amp circuit with a 20 Amp or 30 Amp fuse or breaker, the next thing you should do is book your own funeral. If you have a second battery in your trunk, add a second fuse next to it.Over-fusing is the simplest and most terrible single thing that could kill your family and burn the house. ![]() The fuse holder attaches to the positive post on your car’s battery. The rule of thumb is to place the fuse holder around a foot or a foot and a half away from your battery at the most, but less distance is ideal. Leaving too much distance increases the exposure to dangerous wiring in the event of a short circuit. You need to install your fuse holder very close to your car’s battery for maximum effectiveness and safety. And, a few new fuses are a lot less expensive than dealing with an electrical fire or having to replace your entire audio system. But it’s a good thing because this lets you know that something is wrong. If you have replaced a fuse and it blows again, it can be frustrating. If you use a fuse that is too small, the circuit will break long before any of your gear is at risk, and your audio performance will be greatly hindered. If you use a fuse that is too large, then too much electricity will get through it. The correct size of fuse to use in your car is the size that allows the maximum current to pass through that your audio equipment is rated to handle. With that in mind, you do have 5 amperes of leeway. Choosing the larger fuse offers you less protection. Going with the lower ampere fuse makes it more likely that you’ll blow the fuse accidently, even under a safe amount of current. If your total draw is somewhere in-between two sizes of fuses, you can go with one or the other. How many amplifiers do you have, and how many amperes are they rated for?įor example: If you have three amplifiers that draw 60 amperes, 40 amperes, and 30 amperes each, then you need a 130 Ampere fuse. In order to determine the correct size of fuse to install at your battery, look at the equipment that’s running off the main wire coming from your battery for your audio system. If you don’t have a fuse, and your battery starts to drain its entire charge into the wires that travel throughout your vehicle and causes them to reach extreme temperatures, you’re going to have a very bad time, and that’s why you need a fuse at your battery. ![]() Your amplifier probably already has its own fuses, but they are only designed to look after your amplifier. This break in the circuit cuts off the flow of electricity and protects everything on the other side of the fuse. When a fuse encounters more current trying to pass through it than it can support, the fuse will blow, and the circuit will be broken. Between all the things, there is not a lot of room for error. There are so many variables to installing car audio equipment, including different levels of power, different gauges of wire, different sizes of alternators and batteries, and the audio equipment itself. The fuse is a crucial piece of safety equipment that is necessary to have, especially when you’re running wires all the way from the battery under your hood to the amplifier in your trunk. ![]() Installing the correct size of fuse is just as important as having one in the first place, so let’s go over some fuse basics, and then we’ll explain how to choose the correct size for your car audio installation.įuses are added to your car’s electrical system as a safeguard to help prevent damage to your audio equipment, the rest of your vehicle, yourself, and your passengers. There’s no understating the importance of fuses in your car audio setup.
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