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Re: + or - ground whats the difference?
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Posted by jdemaris on January 25, 2005 at 05:48:15 from (209.23.30.39):
In Reply to: + or - ground whats the difference? posted by otis on January 24, 2005 at 21:13:45:
There's no difference in performance, just convention. If you were to put a modern charging system on, e.g. a 12 volt alternator, you'd be hard pressed to find one that's positive ground since negative ground is the current accepted standard. Many voltage regulators have a polarity, ignition coil hookups, diodes/rectifiers, radios, etc.
In the electroncs "academic" world, the electron theory is just that - theory - an unprovable idea at its time of inseption an no one really knows which way electrons flow. Way back some experts felt positive went toward negative (the Electron Theory), and other's felt negative went towards postive (the Hole Theory). Thus the reasons whey some engineers liked postive ground, and others liked negative ground. Now that sub-atomic particles are being studied, downs to neutrinos, quarks, bosons, etc. the guessing game is even more convoluted.
Back to the real world, your tractor doesn't care which ground you use, just wire it correctly.
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