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:
toddc...@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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