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Posted by John Grabowski on October 22, 2009, 8:02 am
> Is it normal to have some residual voltage, under 5 volts, between the
> neutral and the ground? Voltage between hot and neutral and hot and ground
> is 120v.
*I wouldn't call that normal, but I have found that sometimes. Make sure
all of your grounds and neutrals are tight in your electrical panel.
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Posted by Michael Dobony on October 22, 2009, 4:24 pm
On Thu, 22 Oct 2009 08:02:45 -0400, John Grabowski wrote:
>> Is it normal to have some residual voltage, under 5 volts, between the
>> neutral and the ground? Voltage between hot and neutral and hot and ground
>> is 120v.
>
>
> *I wouldn't call that normal, but I have found that sometimes. Make sure
> all of your grounds and neutrals are tight in your electrical panel.
They are all tight.
As far as under 5v, the needle moves on some outlets when measuring neutral
to ground. I know that either ground or neutral will pick up stray
induction voltage when running along metal beams.
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Posted by John Grabowski on October 22, 2009, 4:44 pm
>>> Is it normal to have some residual voltage, under 5 volts, between the
>>> neutral and the ground? Voltage between hot and neutral and hot and
>>> ground
>>> is 120v.
>> *I wouldn't call that normal, but I have found that sometimes. Make sure
>> all of your grounds and neutrals are tight in your electrical panel.
> They are all tight.
> As far as under 5v, the needle moves on some outlets when measuring
> neutral
> to ground. I know that either ground or neutral will pick up stray
> induction voltage when running along metal beams.
*Try the same testing with your main breaker off so that no current is
flowing in the house. I'd be interested in what your results are.
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Posted by Tony Hwang on October 22, 2009, 8:50 pm
Michael Dobony wrote:
> On Thu, 22 Oct 2009 08:02:45 -0400, John Grabowski wrote:
>
>>> Is it normal to have some residual voltage, under 5 volts, between the
>>> neutral and the ground? Voltage between hot and neutral and hot and ground
>>> is 120v.
>> *I wouldn't call that normal, but I have found that sometimes. Make sure
>> all of your grounds and neutrals are tight in your electrical panel.
>
> They are all tight.
>
> As far as under 5v, the needle moves on some outlets when measuring neutral
> to ground. I know that either ground or neutral will pick up stray
> induction voltage when running along metal beams.
Hi,
Using DVM? Not a good choice in a case like this. Good old analog meter
is still very useful!
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Posted by Wayne Whitney on October 22, 2009, 4:29 pm
> Is it normal to have some residual voltage, under 5 volts, between
> the neutral and the ground? Voltage between hot and neutral and hot
> and ground is 120v.
The neutral and ground are tied together at the service entrance, and
should not be tied together anywhere else. So if you measure the
neutral to ground voltage at some point distant from the service
entrance, and there is any current on the neutral conductor anywhere
between your measurement point and the service entrance, you will see
a voltage difference. This is due to the voltage drop from the
resistance of the neutral wire carrying that current.
Cheers, Wayne
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> neutral and the ground? Voltage between hot and neutral and hot and ground
> is 120v.