Re: battery polarity

Posted by John T on February 13, 2006 at 06:25:23 from (66.244.90.98):

In Reply to: battery polarity posted by SKane on February 13, 2006 at 04:06:28:

SK, Through the years I have read articles etc and also heard some antecdotal evidence about the merits of Positive or Negative grounding. Unfortunately, I didnt save any of the articles so am running on memory here which aint getting any better as I age lol.

Before there was an established standard, Ford and I believe Chrysler and many tractor vendors used Positive ground. The reasons if I recall from articles were there was less galvanic corrosion between joined metallic frame members when the battery Poisitive was tied to frame ground,,,,,,,,,,,the points pitted less and didnt build up such high deposits (I know I read an article on that, wish I had saved it) ,,,,,,,,and theres the thing about its easier to emit electrons from a relatively hotter electrode to a relatively cooler ground strap on the spark plugs, not sure what polarity that would favor, however, and coil configuration also affects that.

Later the industry standard became Negative grounding and solid state devices are polarity sensitive so now almost all is at Negative ground.

NO WARRANTY on any of this I may have to research the question someday, no time now.

John T (Long retired and rusty electrical engineer)

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