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RedRocket204's avatar
RedRocket204
Explorer
Sep 11, 2018

Wiring Ammeter with Shunt Question, wiring size?



Per the image, I'm wanting to connect the meter labeled as #3. I get that the blue, green, yellow and red wires are not carrying much current at all, so AWG wire size is not my question. However, what I'd like to know is what is it suggested for the AWG size wire for the NEG black wire from the Battery to the 100A Shunt and from the Shunt to the Chassis Ground? I suppose what is throwing me off is the size of the posts on the 100A Shunt as it seems there should be a 5/16" lugs on the wiring for those connections which dictates a larger AWG size, like 4-AWG?

Thanks.
  • RedRocket204's avatar
    RedRocket204
    Explorer
    Sep 11, 2018
    OK, perfect and thank you!

    I figured it should be as such but none of the directions indicated that and a lot of researching and I was unable to confirm wiring size for those NEG wires.
  • Ed_Gee's avatar
    Ed_Gee
    Explorer II
    Sep 11, 2018
    Those wires you state should be equal to the size of wiring used on the rest of the battery connections.......or larger. Comment: I, too, have noticed a deplorably sized bolt connection on many of the provided shunts. One quality battery monitor I bought came with a ridiculously small shunt. I ended up purchasing a quality Simpson shunt to replace it.

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