My RV-6a does not have a ground wire to the regulator. It is using a 1976 honda alternator. The regulator was changed by a previous owner to a VR166 with some wiring changes. I have a new VR166 to install and noticed that the case of the regulator was grounded through the air frame. What size wire should I use to ground the regulator and at what point should I ground to on an 0-360.
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