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Thread: Battery cable question

  1. #1
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    Default Battery cable question

    Anyone know the amp rating of the main starter cable?

    I want to install an Anderson plug for jump starting.

    I'm guessing around 350A-400A??

  2. #2
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    Don't know the answer, but this is one of those cases where "bigger is better" to minimize voltage drop.
    Joel

    '67 Lotus Elan S3 DHC (owned since 1970)
    '17 Ford Focus RS

  3. #3
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    I think the maximum cranking amps on the battery is 600 amps. It would be les than that. You can measure the thickness and get a good idea what you need.
    Dino

    Sarthe Grey Rossion Q1 (Sold to a good home in Colorado)
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    Peter,
    2/0 up to 25'
    4/0 up to 18'
    6/0 up to 6'
    I always use solder fittings but I over do everything

    Kind regards
    Jim

  5. #5
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    Thanks for replies guys.

    Quote Originally Posted by creteman View Post
    Peter,
    2/0 up to 25'
    4/0 up to 18'
    6/0 up to 6'
    I always use solder fittings but I over do everything

    Kind regards
    Jim
    Creteman.

    Excuse my lack of knowledge of US wiring sizes, but if 6/0 is thicker cable than 2/0, wouldn't the thicker cable be used for longer runs?

  6. #6
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    Your assumption is correct--but American electrical wire sizes are numbered opposite to your intuition. The largest wire diameters have the smallest "gauge" number. See the explanation here:
    http://en.wikipedia.org/wiki/American_wire_gauge
    Joel

    '67 Lotus Elan S3 DHC (owned since 1970)
    '17 Ford Focus RS

  7. #7
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    Cheers Joel.

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