Electrical Questions? Ask an Electrician Online.
Hi, I'm Mike G and I'll be glad to assist you.
Is it one more than one circuit?
Do you have a 2 wire voltage tester?
More than one circuit puts the problem at the panel or ahead on the utility lines. If lights are brigh and dim it would suggest a bad neutral connection. Open the panel, check the termination of the neutral wire, corrosion on the termination may be present and need to be cleaned and coated with a de-ox compound. If nothing apparent, test the incoming wire terminations. Hot to hot for 240V, each hot to neutral for 120V make the test with the main breaker off. Let me know what you discover.
Is there only the one panel?
Is the surge occurring when you test or not?
Test with power on now. The first test was to see if was ahead of the main breaker.
Check connection. Tighten terminations and test again.
One more thing. If after tightening the terminations the reading remain the same, pull the breaker and visually check the jaes and the buss for signs of arcing.
Check the jaws of the breaker for corrosion and or arcing
OK, after all that it appears that the issue is on the utility company lines or in the meter. You'll need to put in a troublecall to them. Tell them there is a voltage imbalance and surges.
Very good, good luck.