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Thread: Diameter of + Battery Cable?

  1. 11-01-2013, 03:08 PM #1
    37yrold911
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    Diameter of + Battery Cable?

    Does anybody know the diameter of the positive battery cable on a 1973.5 car?

    I am looking for a precise fit for a solder on terminal, so I need to know the AWG on it.

    Also, curious if I really do have a stock cable, so closeup photos are welcome...

    Thanks!
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  2. 11-01-2013, 07:30 PM #2
    edmayo
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    According to a post I answered 5 years ago ,310" bare end, no insulation.
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  3. 03-31-2014, 03:32 PM #3
    carguy5598@aol.com
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    Do we know if wire gauge of second battery is same?
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  4. 03-31-2014, 05:35 PM #4
    edmayo
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    Yes it is.
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  5. 04-04-2014, 01:08 PM #5
    dummkopf
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    Quote Originally Posted by edmayo View Post
    According to a post I answered 5 years ago ,310" bare end, no insulation.
    I am finding tables that will cross reference inches to AWG size. As far as I can tell, that is in between 1 and 0 gauge.

    I was wondering what size it was. When I bought some took a sample with me and it matched up closest to 1 gauge. I'm using welding lead.
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  6. 04-04-2014, 01:57 PM #6
    bboss
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    I believe all the wire on early Porsches is metric gauge (not AWG / Brown & Sharpe). Based on Ed's measurement, I bet it's actually 8mm.

    Here is a chart I have bookmarked from wikipedia that may be helpful or at least interesting: http://upload.wikimedia.org/wikipedi...auge_Chart.pdf

    Also, AWG for multistrand wire is not really diameter based - it is driven by ampacity or the sum of the gauge of the individual strands. Therefore welding cable (which has a lot more strands for a given gauge) will have a different overall diameter than automotive wire.

    If your goal is to match the ampacity of the original wire, I think you would be better off with 1/0 than 1 awg.

    Hope this helps.

    Brian

    Quote Originally Posted by dummkopf View Post
    I am finding tables that will cross reference inches to AWG size. As far as I can tell, that is in between 1 and 0 gauge.

    I was wondering what size it was. When I bought some took a sample with me and it matched up closest to 1 gauge. I'm using welding lead.
    Brian Boss
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