[3rd_gear_Ted]

Since only electricians and God can make light.

Here's my $.02 worth.

I've seen the voltage get changed when the utility changed the transformer taps. Voltage would get too high in the evening. I reminded the utility via e-mail to keep my max voltage within U.L. parameters or my insurance can be compromised.
Just a CYA thing I did cuz I could as a smart a** Electrician.