I added a double pole breaker in my panel box for a dryer receptacle. When I finished, I noticed the refrigerator was out - and the microwave. Went back to the panel and noticed that ALL the breakers were tripped on the left side. Reset them and all is OK.
The breaker I had just added was on the right side. House is about 4 years old. I can't imagine I tripped a bunch of breakers just by simply reinstalling the panel box cover. Any ideas?