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Thread: fuse the pc?

  1. #1
    Low Bitrate LVExpo's Avatar
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    fuse the pc?

    should i fuse the pc? the m2-atx comes with a 15A fuse, is that enough "fused"?

  2. #2
    Neither darque nor pervert DarquePervert's Avatar
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    Put a fuse close to the battery, as well. You'll be fine.
    Have you looked in the FAQ yet?
    How about the Wiki?



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  3. #3
    MySQL Error MatrixPC's Avatar
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    Also, fuse the other hot wire too (the ACC/IGN wire). 1A or 3A fuse should be good on this wire.
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  4. #4
    Low Bitrate LVExpo's Avatar
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    can i do this?:

    an 8 gauge wire with a fuse near the battery to a barrier terminal strip (c picture!!) under my dash and from there with an 18 gauge wire (like the one that comes already with the ampie case) to the case/m2-atx????

    if i want to use a thicker cable, i have to change the whole connector on the case. if its not a good idea, to use 18AWG, then why does the ampie case comes with 18AWG?

    like i said, we talking about 6ft (from dash to the passenger seat).

    i am really sorry to bather with all those questions, but i really wanna do everything right. don't wanna risk any fire or brake expensive computer parts!
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  5. #5
    Maximum Bitrate buurin's Avatar
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    Quote Originally Posted by LVExpo
    should i fuse the pc? the m2-atx comes with a 15A fuse, is that enough "fused"?
    from my understanding the purpose of the fuse near the battery is to protect the wire whereas the fuse on the m2-atx protects the PSU

    Without a fuse near the battery:
    Imagine your power wire got shorted somewhere inside the car. A whole lotta current is going to run from the battery to wherever it is shorted inside the car which leaves you with like 8 feet of wire being heated up and ready to start a fire. Even if/when the m2 fuse blew, the battery is still being shorted because the short is BEFORE the m2 fuse.

    However with the fuse near the battery, when it blows it essentially disconnects the battery from the short, assuming the short is not before the fuse, which is why you want to keep the fuse as close as possible to the battery.

    Hope that helps.
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  6. #6
    Low Bitrate LVExpo's Avatar
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    sorry, but it does not help. i have a fuse next to the battery, but do i have to use a fuse between the barrier terminal strip end the computer case? i think not, but i wanna make sure!

    my biggest problem right now is: is the 18 gauge wire that came with my case (ampie/voom) thick enough to power the computer?

    i also think about running an 1 gauge (the thickest possible) back in the trunk to a nice, fused distribution block and from there to the computer, the amps and maybe my power inverter that i will use (if i will use it) for show stuff like a fog machine. but it still leaves the same question: IS THE 18 GAUGE WIRE THICK ENOUGH??? probably 6ft of 18 gauge wire from computer to battery/distro block and IGN to ACC or dome light. and of course the ground somewhere at the right spot

    is there nobody who got pictures how there installed there powering??

    hopefully somebody can help me!

  7. #7
    FLAC Jahntassa's Avatar
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    It depends on how much current the computer pulls. Keep in mind most of the wiring in the car is 16/18 gauge and some of those circuits pull 10-15 amps.

    If that wire came with the case that'd designed to hold the computer, it'll be fine.

    You still want to have a fuse between the barrier strip and the case in case something in the computer shorts out.

    1) So you don't have to replace the larger fuse up front
    2) the smaller wire would probably melt and cause a fire before the large fuse at the battery ever blew.

    I think the formula for fusing is get a fuse that's draw + 10% or something like that.

  8. #8
    Low Bitrate LVExpo's Avatar
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    i thought the same thing, that, when it comes with the case, it should be fine. guess i just wanted to hear that from another person.

    i will figure it out somehow.

    the remote wire from an radio to an amp is always very thin, so the ign cable that goes from the ignition to the computer can be thin also right?

  9. #9
    Maximum Bitrate buurin's Avatar
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    okay i think i get you... i was concerned about this also...

    what i was ultimately told is that since you only have about a foot of 18g it is fine... the explanation being that the voltage drop(loss) across the 18g piece of wire will be so small(due to the wires length) that it will not generate enough heat to worry about.
    B Smoov
    Project Status: 90% Complete

    Next Step: TIVO for Radio

    Ampie Case :: MII10000 Mobo :: M1-ATX PSU :: 512MB RAM :: 2.5" HD, 60GB, 5400rpm, 16MB Buffer :: DWW-700H :: Centrafuse

  10. #10
    Maximum Bitrate buurin's Avatar
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    and why in the world would you put a fog machine in your car?

    why not put something useful like a foam or bubble machine...

    c'mon use your head

    jk
    B Smoov
    Project Status: 90% Complete

    Next Step: TIVO for Radio

    Ampie Case :: MII10000 Mobo :: M1-ATX PSU :: 512MB RAM :: 2.5" HD, 60GB, 5400rpm, 16MB Buffer :: DWW-700H :: Centrafuse

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