ground cable of generator?

Discussion in 'Sparky's corner' started by PatricksBuick, Oct 5, 2019.

  1. PatricksBuick

    PatricksBuick PatrickBuick

    on the back side of the generator (internal regulator) is a ground-connection.
    I could swear there was never a cable conencted.
    But since my generator is failing now I winder whether there should be a cable?
    Is this connected in your vehicles? Whereto engine or chassis?

  2. Dan Gerber

    Dan Gerber Platinum Level Contributor

    Hello Patrick.

    I'm not an expert but I know a thing or two about automotive and motorcycle electrical systems. Personally, I've never seen a ground wire installed on an automotive alternator, internal or external regulated. The mechanical connections between the installed-alternator housing and the engine block, cylinder head, mounting brackets and adjustment bracket will provide excellent ground current paths... Providing those connections are free of corrosion, paint, non-conductive surface treatments (i.e., anodize), etc. I always sand the mating surfaces prior to installing a new alternator, just to make sure.

    I hope this helps.
  3. PatricksBuick

    PatricksBuick PatrickBuick

    Thanks Dan. A new generator solved the issue. I did not use the grd connector either.
  4. 12lives

    12lives Engage! - Jean-Luc Picard

    My 2 cents: IF you are using a hi-amp alternator it is smart to run a ground from the case to the frame/battery/block. Think about it. You will need a 6 GA positive wire for 100 amp load. Why depend on the little original ground? The 100 amps is making a loop!

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