In my house, I had to replace the entire breaker box because at the time, it was 30 years old. I was getting arcing in the lights and heavy loads. When you pull the breaker, check the buss bars and make sure they're clean. You may have a high resistance connection there that's contributing to the problem.

__________________
-Evan


Benz Fleet:
1968 UNIMOG 404.114
1998 E300
2008 E63


Non-Benz Fleet:
1992 Aerostar
1993 MR2
2000 F250