Bill........while there is an obscure advantage to positive (+) ground, negative ground (-) came about because of 12-volt ALTERNATORS. The alternator is an ALTERNATING CURRENT device that needs to be changed to DIRECT CURRENT by 1-way valves called DIODES to charge a BATTERY. The outer case of the diode is NEGATIVE but needs a HEAT SINK to keeper COOL so the silicon doesn't melt. The case of the alternator acts as an HEAT SINK. While you kenn "insulate" the alternator case from the engine block that is generally a non-starter 'cuz its EXPENSIVE. Wanna blow yer mind? Consider the FIBERGLASS CORVETTE. Bottom line, "earth" (or ground) kenn be positive (+) and negative (-) at the same time. Ain't electrons funny???........electrical Dell, FCC 1st Class License and retired Boeing Flt Test Engr
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Today's Featured Article - Gatherin of the Orange - by Rick Nikolich. In July of 1998 I was talking to fellow Allis Chalmers collector Mike Schilling about the annual "Gathering of The Orange" AC show coming up in August of 1999. He got this wild idea that we should get a convoy of AC tractors and drive them from Charlotte, Michigan 105 miles to LaGrange, Indiana.
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