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Thread: Wire & fuse size for 360W psu?

  1. #1
    Join Date
    Jul 2008

    Wire & fuse size for 360W psu?

    What size wire should I use for the Opus 360W psu? The psu itself uses 3x16awg wires for 12v input. I've got a 12awg solid copper cable (used for wiring houses) that I'm planning on using, but I'm not sure if it'll be enough. Also, what size fuse should I put in line with the battery? I've seen 20A for 150W, but I haven't seen anything said for any higher. The psu has a 30A fuse onboard; should I just use another one of those? Is there a good way to tell what size wire for what amperage, and what amperage for total input; or is it all just guess & check? Thanks.

  2. #2
    Join Date
    Jan 2008
    Dartmouth, MA
    You should go with the same size fuse that is on the PSU, maybe a little bit smaller if you don't plan on using the psu's full potential.

    For wire size look at the 12 volt table here:
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  3. #3
    Variable Bitrate dMand's Avatar
    Join Date
    Oct 2007
    The Evergreen State, Washington
    I am using an 8Guage wire with that psu. Nevertheless, the wire rating calls for the use of a 10guage wire @ 8feet in length maximum, or 8 gauge @ 15 feet of wire max.

  4. #4
    Join Date
    Jul 2008
    Perfect! Thanks Paul.

    For thread preservation, the suggested wire gauge is 10awg @ 8 feet, 8awg @ 15 feet.

    beat me to it dmand ;-)

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