Lightning Revisited [RE-wrenches]

[Drake Chamberlin]

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At 11:09 AM 4/16/02 -0700, you wrote:
>Drake -
>
>Inductance works not by raising the potential of each of the conductors
>a set amount all along the conductor.  Inductance causes an
>electromotive force AROUND a circuit which is proportional to the time
>rate of change of the magnetic flux through the circuit.  The "magnetic
>flux through the circuit" is the amount of magnetic field through the
>area of the circuit.

That is why I used the example of 2 wires in a conduit.  Both conductors 
would be exposed to approximately the same flux.  The magnetic field would 
cut through the conductors equally, as they would be in very close 
proximity.  All along their length they would be getting equal exposure as 
the magnetic pulse rose and fell.

Code, in general, requires wires of the same circuit to be run 
together.   Both wires would rise in voltage at the same rate.  Voltage is 
relative.  Ground potential is arbitrary.


>   That is why the problems with a large series
>circuit in which the wire returning current from the extreme panel does
>not return along the same path as the wires connecting the panels.

That would definitely be a problem.

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