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Positive ground?

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Photofarmer

11-09-2002 09:11:58




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All this talk of positive ground is confusing. Do you mean that when I reinstall my battery after charging that I should hook the ground cable to the positive terminal? I didn't think to look when I pulled the cables where they were attached-I assume pos to pos. neg to neg-a clarification please? I know-I am stupid




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Rich,NJ

11-09-2002 15:00:14




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 Re: positive ground? in reply to Photofarmer, 11-09-2002 09:11:58  
This will surprise you no doubt, But upuntilthe early fifties and theintroduction of 12V systems,most automobiles were plus grounded also. Years ago, My grandmothers neighbor bought her old 48plymouth and at one point,put in a new battery. His son in law, who was a mechanic, did the job and all the gauges worked backwards. Full was empty, etc.The son inlaw had never seen it before either. These old tractors are probably the last working examples of this, But it was once common. Rich

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Dell (WA)

11-09-2002 09:37:18




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 Re: positive ground? in reply to Photofarmer, 11-09-2002 09:11:58  
Photofarmer..... ....YES, OEM 6 volt N-Tractors are POSITIVE grounded. And yes, that mean connect that flat woven flexable battery cable to the battery (+) plus post.

If you have a 12 volt converted tractor, your alternator DEMANDS negative battery (-) ground. Understand?

While your starter doesn't care positive or negative ground, your generator/alternator does care. Headlights don't care. BUT you can loose upto 40% of your sparkies with incorrect grounding..... .....Dell

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fractured history.......bg

11-09-2002 12:16:16




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 Re: Re: positive ground? in reply to Dell (WA), 11-09-2002 09:37:18  
Back in the early days of automobiles, Thomas Edison and Charles Kettering were wiring up one of the first self-starters. Edison was doing the wiring and Kettering was watching football on his kerosene-powered TV. Edison, who was hard of hearing yelled across the shop to Kettering "How should this be grounded?" Kettering had a mouthful of popcorn and replied "whatever...."
Edison didn't hear him so he asked again. Kettering replied, "whatever...." Edison, thinking he heard a reply, asked, "are you sure?" Kettering, growing more frustrated at being interrupted during the big game, yelled back,"POSITIVE!!!" And there you have the rest of the story....

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Sam#3

11-09-2002 18:01:29




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 Re: Re: Re: positive ground? in reply to fractured history.......bg, 11-09-2002 12:16:16  
Best explanation I've heard so far.



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Jim Cox

11-09-2002 18:29:50




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 Re: Re: Re: Re: positive ground? in reply to Sam#3, 11-09-2002 18:01:29  
and all this time I thought it had something to do with some insane idea that a positive ground wouldn't rust as fast. They thought ionization of the iron/steel wouldn't allow as much penetration of the oxygen that causes rust. Some people actually believed current flowed from positive to negative too.
Jim Cox in SW Missouri



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