[RE-wrenches] Fwd: Grounding on a glacier??

[R. Walters]

I've worked on supposedly ungrounded high voltage systems on Electric  
vehicles. Got zapped when I touched the frame and a battery terminal.
There definitely can be mA of leakage to ground, even if its not  
supposed to be there. Otherwise I welcome the move to ungrounded DC.
Gee, red is positive, black for negative color coding is actually NEC  
compliant on an ungrounded system.....

R. Walters
Solarray.com
NABCEP # 04170442	



On Jul 25, 2009, at 10:03 AM, boB Gudgel wrote:

> toddcory at finestplanet.com wrote:
>> "If neither pole is grounded then both must be treated as  
>> potentially hot."
>>
>> _Only with regard to the other hot wire._ If you do not reference  
>> one conductor to ground than the other one will not present any  
>> danger unless you are referenced to its mate... as in touching  
>> both wires at once.
>>
>> Todd
> Except of course, if there is more leakage (capacitive) from one  
> ungrounded wire to ground than the other ungrounded wire to
> ground.   You may still feel a tingle... The higher the voltage,  
> given similar leakage, the higher the tingleage. (is that a real  
> word?)
> I am more apprehensive about touching ungrounded and live things  
> (although sometimes I do). People have a larger area and
> therefore a higher capacitance than birds do.
>
> This applies for AC (mainly) of course.
>
> boB
>
>
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