[RE-wrenches] Fwd: Grounding on a glacier??
Matt Tritt
solarone at charter.net
Sat Jul 25 18:38:39 PDT 2009
Yay, Ray,
That's what I like to hear!
Matt T
R. Walters wrote:
> 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 <mailto: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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