CDN,
I was experiencing the same problem at my house with flickering lights occasionally.I checked all connections and could find nothing wrong.Used a Fluke digital to take voltage readings and everything appeared normal.Called out the PoCo. They came while I was at work,checked everything and left a note that said all was fine on their side.That evening,while outside, I noticed my neighbors lights doing the same thing.They were served by the same x-fmer. This time, when I pulled the panel cover to take readings,I used an analog meter and could see the voltage from each phase to neutral dropping to below 90 volts and then back up. Called PoCo.They came right out, pulled out their digital meter,tested and said everything is OK. I then took him inside to the panel where he could observe the analog meter.After seeing this, he decided to check his connections. They found the neutral lug burnt up on the pole mounted X-fmer.Problem solved.
Since then, I never use a digital for troubleshooting this kind of problem.
