Just wanted to pass along a safety reminder. Today I was installing a new band saw on a 30amp 220v circuit. While I had the breaker box open I thought I would check the tightness of the screws on all the breakers. I was surprised that every one of the 120v circuits could be tightened, some at least 1 full turn. The box was installed about 6 years ago. I was also interested that all the 220v circuits, (20,30, 50 & 60 amp) were good and tight. I didn't see any evidence of any heat spots due to the loose screws, but I do know tight is safer than not tight.
Just a reminder that you may want to check yours, with the main breaker off of course.
Perry