In an ideal world they are only hot relative to the other. In the
real world there will be leakage and also faults that connect one or
other pole to the grounding system. So then the other pole will
thereby become hot. So, again, they are both potentially hot. And
both therefore need to be
If neither pole is grounded then both must be treated aspotentially 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.
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.
I have heard that this
requirement (to bond negative to ground) as well as bonding one of the
AC conductors to ground (neutral wire) was pushed through by wire
manufactures and unions. The wire manus sell more of their product and
the electricians get more labor in installing them. I also
Re: [RE-wrenches] Fwd: Grounding on aglacier
My understanding is that it saves cost to ground one of theconductors. Then
you can use single pole switches, fuses andbreakers. If both of the circuit
conductors are 'hot' then youwill need to use double pole everywhere.
Why? A single pole switch
Hi Jay,
An interesting quandary indeed. My thoughts are to build a grid of
radials with short ground rods at the ends, extending in all
directions from the equipment. This approach does not use anything but
wire, short ground rods and ground connectors so there is no equipment
to fail or
Larry Crutcher, Starlight Solar wrote:
Hi Jay,
An interesting quandary indeed.
This is another good example of an application that I was trying to
grill Sunpower about --- as far as grounding their modules that need to
be positive grounded
in order to take advantage of their higher
As long as we're already on the subject, BESIDE the NEC requiring it,
why is it that we have to bond the ungrounded conductor on the battery
side of a DC system??? I believe that we are the only country in the
world that has this requirement. As long as all the system cabinets,
mounting
I have installed tons of SunPower 90's without any ground connection
on RV's with noticeable loss of power. I believe the problem only
occurs when you have a path to ground from the frame.
Larry
On Jul 23, 2009, at 12:58 PM, boB Gudgel wrote:
Larry Crutcher, Starlight Solar wrote:
Hi
Larry Crutcher, Starlight Solar wrote:
I meant to type ...NO noticeable loss of power.
Hi Larry But how do you ~really~ know you weren't losing power
because of their lower efficiency unless there was
a comparison made ? :) I'm not sure that I believe it's all that
much of a
boB,
I usually put only two in series and use MPPT to down convert to 12
volts. Some RV customers have 6~8 modules, series/parallel. I promote
the use of battery monitors in all systems so if there was a
performance issue, I would have seen or heard of it by now. RV
customers have
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