Roman Black wrote:
>
>Michael Vinson wrote:
>>
>> Russell McMahon wrote, in part:
>> >- Mean current flow into any circuit node is zero
>>
>> i.e. TOTAL current flow
>>
>> >- The sum of potentials around a closed loop equals zero
>
>
>And in regards to AC current? Ever touched
>415v AC when wearing rubber soled shoes? One
>connection only, no closed loop and "ouchy"
>current.
>;o)
>-Roman

Still the sum = 0.  At the peak, there is a drop of 587 volts (for 415v rms)
across your finger|terminal|ground, and almost the same across your
grount|boot|foot capacitor (as it is still being 'charged') which leads to a
voltage drop in your body.  Current flows and you scream :)


diagram:       \|/     <---- hair standing up
               ( )
        587v   ,-,
 ---------. +-- | \   <----- voltage drop across body.  owwww
  device  |     | /
          |    / \   577v <-- boots not fully charged
 _____________/___\_____
   0v   ground

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