Posted by skk-big red fan on September 11, 2007 at 19:45:33 from (71.31.214.99):
In Reply to: positive ground posted by Jayrod on September 10, 2007 at 20:59:22:
Power flows from a growing higher potential to a proportionally lower potential, or put another way from an increasing voltage source to a decreasing voltage source.
That which we call a positive by any other name might be a double negative; or positive.
Water flows down hill, higher potential to lower potential.
Power flows out of a generator to a load, unless you motorize the generator (turn it into a load) or run it at reduced voltage from a larger power source, electric grid, then it becomes a voltage reducer in the system. Var generator or absorber.
Lastly vars are like the foam on a beer, nobody wants the foam or to deal with it, but its all part of the experience. So enjoy. Thanks Neal E.
Electron theory, conventional electric application, AC & DC wiring not comparing apples to oranges. Black wire in 120 AC=hot (potential, but int DC wiring black is the ground. EE engineer told me once I was crazy as I was wiring up a AC duplex in a house. Theory vs practical application.
So in practice, on a tractor, consistency and polorization is the only thing important in a system with a generator. However if installing an alternator, you'd best get those diodes working in the proper direction. Neg ground alternator must be hooked up to negative ground battery and vise versa with a positive ground alternator, and yes they do make them.
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