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Thread: Am I about to make a mistake? Powering Carnetix

  1. #11
    Constant Bitrate
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    What my plan to do, is basically to use an amplifier wiring kit.....its perfect for what you need, and pretty cheap to, as it includes everything you need!

  2. #12
    Constant Bitrate
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    Quote Originally Posted by BiG K View Post
    What my plan to do, is basically to use an amplifier wiring kit.....its perfect for what you need, and pretty cheap to, as it includes everything you need!
    yes, good idea. It's also a good idea to go with at least 4 gauge instead of 8 gauge. It will give you enough room in case you want to add a couple amplifiers along with the carputer.

  3. #13
    Maximum Bitrate Ruffy's Avatar
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    whenever reducing a wire size always fuse it to protect the wire from burning up.

    So going from 8ga from battery to 16ga is fine as long as you use a fuse that will blow below the threshold of the wires burn point.

    Dont just solder or couple a large to small wire. If something happens and that device starts trying to yank more power than the smaller wire can push then it will burn up. Very dangerous.

    Sure most times your safe since alot of devices dont draw alot of power and never will, but theres always a chance, better to be safe than sorry. I'd rather use a 20cent fuse to protect something than risk damaging thousands of dollars worth of equipment and car.


    Best bet is a fused distribution block. Which is what I use. 1/0ga cable from battery to fused distro block, then car pc has it's own fuse, harness plugs into the distro block.
    Car : 00' Chrysler 300M
    Speakers : Rainbow Audio SLC 265 | Subs : Diamond Audio D6 12" Subs X2
    Amp's : Hifonics ZXi 6006 AB | Hifonics BXi 1606 D
    CarPC: HP Laptop AMD Sempron 3000+ | 1.5GB RAM | DVD+RW | 80GB 5400RPM HD | ATI R200 Video

  4. #14
    Variable Bitrate chevyn8's Avatar
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    Yeah, you can't have too many fuses I will have 4 gauge running to a distribution block with fuses, 8 gauge to the carnetix and 8 gauge to the amplifiers. Then an inline fuse on the the primary output to the computer and another fuse on the secondary output to the LCD. Oh, and a fuse on the 4 gauge near the battery. Fuse selection is also important. You want a fuse that is lower than the max the wire can handle (so it pops before the wire burns) and higher than the normal peak load (so it will only pop when a problem exists). The problem I have now(and why you need good wire) is some crappy 8 gauge wire I was given and thought I'd use it (it's mostly insulation and probably more like 12 gauge). Amplifiers on a good 8 gauge and turned off. Anyway, I'm getting a voltage drop under load with my carpc running of about 1.5+ volts front to back pulling about 5 amps...causing my P2140 to shutdown because it thinks I have a low battery (battery is fully charged). I adjusted the low battery shutdown for now.

  5. #15
    Newbie PatInTheHat's Avatar
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    If for example im splicing from my ignition (unkown guage but different) to 12 guage for carnetix, should I fuse that? (and then again to carnetix uses 16 guage or something so it would change again ugh, another fuse?)

    How about taping an power line thats powering something like a XM sat box again simliar situation? fuse fuse fuse every time I splice ?

    How are you guys actually putting the fuse in between? I see radio shack sells fuse holders for $4-5 a pop but if I need like 10 of these its going to get messy ;(

  6. #16
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    Distribution block

    You mentioned the distribution block. Having a hard time finding one or someone that knows what they are here in Central CA. Any good suppliers that you can recommend? Online is fine as well as phone ordering. Thanks, Glenn.

    Quote Originally Posted by chevyn8 View Post
    Yeah, you can't have too many fuses I will have 4 gauge running to a distribution block with fuses, 8 gauge to the carnetix and 8 gauge to the amplifiers. Then an inline fuse on the the primary output to the computer and another fuse on the secondary output to the LCD. Oh, and a fuse on the 4 gauge near the battery. Fuse selection is also important. You want a fuse that is lower than the max the wire can handle (so it pops before the wire burns) and higher than the normal peak load (so it will only pop when a problem exists). The problem I have now(and why you need good wire) is some crappy 8 gauge wire I was given and thought I'd use it (it's mostly insulation and probably more like 12 gauge). Amplifiers on a good 8 gauge and turned off. Anyway, I'm getting a voltage drop under load with my carpc running of about 1.5+ volts front to back pulling about 5 amps...causing my P2140 to shutdown because it thinks I have a low battery (battery is fully charged). I adjusted the low battery shutdown for now.

  7. #17
    Variable Bitrate walstib's Avatar
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    Crutchfield has them. Just Google.
    Carputer Project Status:
    0% - Mobo died on 2/17/08
    Check out the worklog for my '01 Pathfinder.

  8. #18
    Maximum Bitrate Ruffy's Avatar
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    www.knukonceptz.com for fused distro blocks

    also Ebay for cheaper.


    I have the KonFUSED 3way
    http://knukonceptz.com/productMaster...0Fuse%20Blocks

    scroll down
    Car : 00' Chrysler 300M
    Speakers : Rainbow Audio SLC 265 | Subs : Diamond Audio D6 12" Subs X2
    Amp's : Hifonics ZXi 6006 AB | Hifonics BXi 1606 D
    CarPC: HP Laptop AMD Sempron 3000+ | 1.5GB RAM | DVD+RW | 80GB 5400RPM HD | ATI R200 Video

  9. #19
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    Smile Distribution Blocks

    Awesome. Thanks for the help. Knew they were out there.

  10. #20
    Newbie PatInTheHat's Avatar
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    I'm still pretty confused as to where I should be adding a fuse.

    Right now I have a 15A fuse from my battery to carnetix on 8 gauge wire.

    I'm planning to add a fuse for the LCD screen which will be going from the carnetix to 12 guage wire and then to whatever gauge the LCD power is using. Does this mean I should fuse right after the carnetix and again right after the 12 gauge? (from what I have read I believe a 5 amper or smaller is what i'll need?)

    I'm also going to be splicing into ignition and ACC lines with different gauge wires in 4 different places. Do all of these need fuses as well? Ugh.

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