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Re: car alarm in-line fuse
What type of alarm system is it? The size of the fuse varies slightly depending how extravagant the alarm is. You could try to low ball it and if it pops the fuse then get a slightly bigger one. You might start out at 15 amps. BUT, if you can tell me the make and model of the alarm then I might find out the correct size. I hope I can help. -Andrew Hawkins
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The fuse size will protect the wiring depending on its size but the question is what amperage does the system draw/use and therefore what size wire is needed and the fuse will be the size of the system amperage draw and the wire size also determined by the amperage draw because if the amperage draw exceeds the capacity of the wire the wire will melt so the fuse should project the wire by cutting the current flow when it exceeds the wire siaze but the system needs the cureetn flow, amperage it is designed to use.
Yes it can be done. This doesnt mean that it should be done. First thing is finding a power supply to supply power to the unit. you would need to find the size of the fuses on the amp and finf a power supply to feed that power. All home theater systems have built in amps on them. It would be much simpler to find a home theater system to fit your need. However if you insist on this setup remember to find proper power supplies and wire the system with the proper gauge wire for the amp draw. No sense in burning down the house over it.
Be sure to fuse the power wire within 12” of the car's battery. This will protect the car's battery in case of a short circuit between the power amplifier and battery. THIS IS A MUST, the amplifier's built-in fuse will only protect the power amplifier not the car's battery.
Use high-grade wire connectors. Use Proper power wire size for maximum current transfer and safety. Improper size power and ground wire can reduce the amplifiers power and poses a risk of damage to the amplifier and the vehicles electrical system. Please follow the recommended "Amplifiers Power Cable Requirements" to ensure maximum power transfer and safety.
To ensure maximum power transfer and secure safe connections, it is recommended to use high-grade barrier spades (for connection at amplifier) and terminal rings (for connection at battery).
Do not run any wires underneath vehicle. Exposed wires have a chance of being cut or damaged. It is best to run all wires through the vehicle under the carpet and/or side panels. This lends to a cleaner installation and less risk of damage.
Use caution when mounting amplifier. Remember there are many electrical wires, gas lines, vacuum lines, brake lines, as well as a gas tank in the automobile. Make sure you know where they are when mounting the amplifier to avoid puncturing lines, shorting wires, or drilling holes in the gas tank.
To avoid possibility of induced noise from the car's electrical system (i.e. popping noises or engine noise), Keep signal wires (Speaker or RCA) away from any electrical wires.
In order to reduce the chance of ground loops (i.e. engine noise); make the grounding wire as short as possible to reduce the wire's resistance. Also, when using multiple components, make sure all units are grounded at the same point.
Avoid sharp edges when running the wires. When laying wiring inside the car, watch for welding burs in channels throughout the car. If necessary adequately grind, finish sand or fill in around any ruff spots so wires will not be punctured by sharp protrusions. Use a grommet to protect the wire when running through the firewall.
Check for shorts to ground in the speaker wiring, the speakers themselves, total Impedance, especially woofers. Proper size power and ground wire and all connections. Use a Ohmmeter or find a friend with one that knows how to use it, If all else fails RMA . Good luck, sumthin