Electrical contractor 37 years. Electrical inspector 2 years
How many people out there worry after a service change or panel change? I just finished a panel change out in a house where the previous homeowner did much of his own electrical work. He / she used a lot of multi wire branch circuits and had the red and black on the same 2020 twin breaker and we all know that is a no no. Do I fix it or do I leave it the way it is? If I put the black wire on one one leg and the red wire on the second leg I could potentially send 240 some where. As I am turning on circuits I found that another black wire is hot which tells me that in a switch box somewhere all whites are tied together and all blacks are twisted together. Now I have to search out the mis-matched wires. Open splice boxes all over the attic. Many electricians on this forum are always cautioning about liability and leave it up to the engineer, Now I am wondering if we should skip service changes and tell them to get an engineer to design what we should do.