Once in a while nagging problem of when a sudden load such as the A/C kicking on, for a (so far) brief period of time ONLY one half of the 200 amp in-house breaker box drops voltage 3 or 4 times in quick succession, then is ok. Last time (real real humid), it did this 3 times in a row when the air came on, then has been ok since with not near the humidity.
It doesn't appear to be the common, as lights on the other side of the breaker box didn't flicker/get brighter or anything and voltages are equal on both legs any other time. It acts as if the voltage is dropping on one leg of the 220.
After close inspection I have ruled out the in-house breaker panel, which leaves 3 other areas that I haven't got to yet.
One, would be something from the transformer through the meter to the breaker.
Two, would be the pole breaker itself.
And three, and yes I know it's a no-no, and I didn't do it originally, but the "0" cables from pole breaker to house box was spliced at one time (under house).
This is my first suspect, and asap I will cut the old one out and redo them fresh with good split bolts, compound, rubber tape and of course vinyl tape to make the connections as air tight as possible. They are not exposed to the elements outside. (Sorry, but a whole new entrance cable is out of the question at present).
Now, something did happen early spring that tends to lead suspicion away from the old splice though.
The pole breaker also supplies 220v service to the separate garage. (For other reasons, I've replaced all the outside connections for the garage tri-plex last year).
But one day a few months ago I flipped the electric welder on, and part of the garage lights dimmed out for a second---however---the wife informed me the house lights dimmed also. Same half of the breaker box lights that recently dimmed. I couldn't get it to do it again.
So in essence, the same problem appeared to occur, except the welder load did not go through the house cable and splice. Anyway folks, I just thought I would throw this out there, and as said, I will replace the old splicing first anyway, and I guess the pole breaker is next. However, I'll call the power company out before I change out the breaker and make sure things are ok from the meter loop to the transformer.
Thanks for any input. Lee. (I just LOVE these once in a blue moon problems!!)