PV Negative Color [RE-wrenches]

[Drake Chamberlin]

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Hi Dick,

If you got shocked on a neutral, I'm guessing that there was a 
problem in the circuit.  It is pretty hard to get a shock from less 
than 12 volts.  If you have a 5% voltage drop on a 120 volt circuit, 
you have 6 volts to ground.  I've licked my fingers and put one on 
the positive and one on the negative of 24 volt battery banks, and 
never felt a thing.   I get a jingle from open circuit, 24 volt 
nominal PV systems, which are usually near 40 VDC.

5% on a 600 volt circuit would be 30 volts to ground, which one could 
feel if s/he were well grounded.

Drake


>BE CAREFUL! The shock you can get from touching a "fully connected neutral"
>could well be
>the one that kills you. If there is no current in it, and often this 
>is hard to
>know, you would not get a shock. If there is current in it, you have presented
>that current with a parallel path to ground. If you don't get a shock you have
>only been very lucky.
>In that case, you were of sufficiently high resistance to avoid one.
>
>If you are sweaty, standing on concrete or earth, touching steel, etc.,
>(especially when dealing with higher voltages,
>although 120 volts kills more people than any other) you won't 
>forget it  .....
>if you survive. Been there done that.


>Dick Ratico
>Solarwind Electric
>Bradford, VT
>
>You wrote:
>"The only time you can get shocked from a neutral is when it is
>disconnected from the ground bus. A fully connected neutral should
>be safe even if current is running through it."


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