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Thread: what size gauge wire for 460A draw max?

  1. #1
    Newbie
    Join Date
    Apr 2005
    Posts
    18

    what size gauge wire for 460A draw max?

    read the forum rules so putting this in off topic... hopefully it gets some responses....


    I asked a question about the difference of battery isolators and relays...

    now the other question...

    I am trying to wire up my truck...
    I have 2 batteries under the hood that are 1000ca duralast golds in parallel.
    They are connected to a 90a isolator on leg A
    then leg b of isolator goes to 2x1300ca batteries in the bed.

    now I have a winch that is about 8-10' away.... the rated draw is 460a max to which I used 3/0 cable.... I want to add a disconnect to the circuit for protection.

    the winch came with 6' of 2 gauge wire.... so my main question is

    winch comes with 2 gauge wire for a winch max draw of 460a which doesnt seem enough...

    I can get a cable disconnect good for 1/0 which is rated for 430a max draw.


    so thus I am confused.... should I go with 1/0 cable and disconnect to connect to the batteries???


    also dont laugh too hard at my mspaint drawing.... all I had handy... also vista wouldnt let me use the text tool... so had to free hand text...
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  2. #2
    Constant Bitrate
    Join Date
    Oct 2004
    Location
    Canada
    Posts
    144
    dont go by the rated max go by the motor FLA then you can size your wire to that.
    do you know the motor data on the winch like HP?

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