Don Y has brought this to us :
On 12/27/2015 10:32 PM, IGot2P wrote:
Took some time this evening and checked the voltage on several outlets in
my
shop and to my surprise I found several at 117v and several at 125v. Then I
noticed that the difference voltages were on different circuits. Then
taking a
look at the breaker box I noticed that each 125v would be directly across
from
another 125v breaker and the same for the 117v circuits.

Well, that gave me a good clue as to what was happening so I opened the box
and
took a look and checked some voltages. I took a picture, added the voltages
to
it, and uploaded it to one of my domains at
http://www.dongares.com/breaker.html so go and take a look.

As I have previously mentioned in an earlier post this is a sub-panel which
is
supplied from the main panel in my home via a 100 amp breaker. I have not
taken
time to check but I am almost willing to bet that I find different voltages
in
my home also. It is going to be interesting to see if what I am getting
from
the street to my home is also different voltages...how you want to bet?

The home was built in 1993 and these differences have never caused a
problem
but it will still be interesting to see what is actually happening.

Do the *easy* things, first.
- measure at the *main* panel
- measure at the subpanel (already done)
- open the disconnect at the subpanel and remeasure at the main panel
Assuming this isolates the problem to the subpanel:
- remove individual loads from the subpanel (open breakers) and measure

Take good notes.

You should be able to diagnose the problem just from these observations.

It has taken an unbelievable amount of drivel and misinformation to get
down to this simple list of things to do to isolate the problem. :-?

--
John G Sydney.