Normal range of variations of line voltage?
We're seeing some interesting line voltage variations that are causing my UPS's to make clicking noises...One of them has a line voltage meter on the front, and I'm seeing variations between about 113VAC and 120VAC on it. As I look at that meter it is almost continuously varying from time to time, a volt change at a time, but when it gets below 114VAC, the UPS clicks.
Is this normal, to get this much variation? Could be just a bad day for the power lines, but not windy or anything.
Is there anything that I should be doing to check this out? I could have an electrician come out, but if we're experiencing something normal here, I don't want to do that.