I know it doesnt make sence, but it does happen. Ive had to trace down so many of these issues over the years i want to scream.
Last year an avista crew working on a transformer dropped a neutral load on a new subdivision in post falls. I was called to fix some issues after it happened. They lost every major appliance....fried. Any light that was on fried....the original electrician ran 12/3 circuits to kitchen, baths, etc to save money.
Same with other houses in neighborhood. A carpenters table saw motor fried.
Avista paid for all repairs. Its the main flaw with edison circuits. Will always be
Thats why i havnt been wiring them like that for a long time. Heck, in 3phase commercial we used to always run what was called a full boat.... On 240 system we ran black,red,blue,green and one white. That was good for 3 separate circuits. Now i doubt youll find a contractor around that does that. Especially with linear load issues. Some guys still wire houses with 12/3 and 14/3.... But i refuse to