Well I have been reading post hear for almost a year but never given my thoughts. This one I will put my 2 cents in. Last fall I got a call from a Handy man that I do electrical work for he told me that the house he was working on had a bad GFIC in the grudge and when he replaced it half the house lost its power. I went over tested power at plug got a low volt reading I went to meter got same on one side of main checked buss coming from meter and same low volt. I called POCO they came out and found power to meter was fine I told them meter must be bad they pulled meter I looked in and seen the buss had been burnt look a little farther and seen were the manufacture left out the bolt that connects the meter socket to the buss we clean it all up and put in a bolt.This house was about 25 years old. I was amazed it lasted that long with the two metals just touching. So what I want to say is check all connections by manufactures as well as others. Cal