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Thread: What can a stock IGN power cable handle?

  1. #1
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    What can a stock IGN power cable handle?

    Heya,

    I've been looking over the thread here: FAQ: Connecting your Car PC's Power and Speakers

    And i still can't work out if the stock cable that provides the 12V when the ignition is turned will handle the current used by the opus PSU? If not i can't see anywhere where the cable gets thicker... at all =\.

    Could a possible solution be to use about 5cm of the stock wire from the harness and then switch it to 8AWG wire?

    Will i need to fuse the IGN cable anywhere like the power cable?

    Regards,
    Rob.

  2. #2
    Variable Bitrate
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    Rob, you could always use a relay. Have this relay triggered by the IGN and for the load side, have it powered directly from the battery.

    What are you trying to do, anyway?
    EPIA Nehemiah M10k, M1-ATX, 20GB 4200 RPM 2.5", 256MB RAM, Win XP Home, Gyration RF Keyboard & Mouse, Zoltrix Nightingale Optical 4.1 PCI Sound Card, Lilliput 619GL-70NP, XM-PCR w/ optical upgrade, Garmin GPS-25LVS, Microsoft MN-710 USB Wireless NIC

  3. #3
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    Well after using the search (:P) i found this Opus acc line wire guage, is 18 the smallest?... seems to answer my question as the IGN (acc) cable won't actually handle more than 5ma with the Opus.. sorted

  4. #4
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    The IGN line just tells the opus to power up/down. The power is supplied by a large guage wire directly from the battery..


    From the thread you linked to..

    You cannot draw your power from this connector because the wire is not thick enough for the amount of current you will have to draw, you will end up burning out the wire and possibly starting your car on fire. This is why you must run large cable 4-8 gauge from your battery.
    Old setup
    Epia M10k, Cubid 2699R case, 512MB, 40GB 3.5" drive
    New setup
    Optiplex 260SX (2.8GHz P4, 512MB, 30GB, DVD)
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  5. #5
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    So am i right in saying that the stock wiring harness can cope with the small signal the opus needs to tell it to power on?

  6. #6
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    Quote Originally Posted by m00ie
    So am i right in saying that the stock wiring harness can cope with the small signal the opus needs to tell it to power on?
    Yes it can....
    Old setup
    Epia M10k, Cubid 2699R case, 512MB, 40GB 3.5" drive
    New setup
    Optiplex 260SX (2.8GHz P4, 512MB, 30GB, DVD)
    Xenarc 700IDT, USB hub, 802.11g, bluetooth, P2140, P5V

  7. #7
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    Great thanks I'm slowly learning my way around all this stuff. I just like asking questions to double check things.

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