Re: It's not about how well they run...


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Posted by Mark in Utah on Wednesday, May 01, 2002 at 3:23PM :

In Reply to: Re: It's not about how well they run... posted by Todd Wilson on Wednesday, May 01, 2002 at 1:21PM :

Electric potentials (voltages) are all relative. If the grounds of two circuits are connected with a conductive wire they will be at the same potential. The unconnected poles will have a potential equal to the difference of the separate circuits. In your scenario the potential difference would be 18 volts, -6v on one side of the common wire and +12v on the other side. The current flows when those other poles are connected. The problems happen when there is not a device in the second line that can handle the potential difference.

Mark.



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