On 07/26/2015 10:50 AM, Ralph Mowery wrote:
....

The voltage going to 106 seems to be way low. Power comming to the house is
by 3 wires. Across two of them will be the full voltage and from either of
those should be half the voltage. If there is more than 2 or 3 volts
difference it is time to start looking for a problem. Usually the neutral
wire is loose if this is found at several sockets in the house on different
breakers.

If you could check several recepticals at the same time or with the same 120
volt devices turned on you may find some are at the 106 and some are around
130 or more volts. The total should add up to what ever is comming into
the house on the 240 volt line.

Good point to add the differential discussion...

What worried particularly is the apparent short-term variability; that
implies something is really going on; shouldn't see much fluctuation at
all other than the very short sag during a large appliance or A/C motor
start and that shouldn't be long enough to even be able to read the
actual dip on a manual meter...just a quick flicker that would be visible.

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