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Re: What happens with wrong polarity?
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Posted by Mark Krzyzanowski - IN. on June 08, 2004 at 21:37:32 from (152.163.253.97):
In Reply to: What happens with wrong polarity? posted by RAR/IA on June 04, 2004 at 17:27:59:
Pretty lucky if you don't get meltdown and fry components. Output from a generator or alternator is a flat line referenced to O VDC as read by a meter or an oscilliscope - either a flat line above or below your reference, and it seems easy enough that so long as the tractor is seperated from true ground by rubber tires, that nothing bad would occur because 12 VDC is 12 VDC to a common reference, right? Not so. I once made the mistake with a -48 VDC system - had a 50/50 shot of getting it right, and got it wrong. It did not like +48 VDC, and smoked to the tune of a few $K. Should've traced the wires further, but got lazy. My father always did say that I must've been the milk man's kid, and I guess that's why I don't look much like him.
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