Running 40 amp fuse in 30 amp

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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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