We have replaced a lot of K&T over the years and seen a lot but this one takes the cake. The initial call was from smoke coming out of the closet ceiling. While we did not find a smoking gun
when we first arrived (it was the next day after the reported smoke) we did notice the 14 gauge K&T was divided into three circuits all on the same 14 gauge neutral and all from the same 120 volt fuse box. So all three circuits were on the same leg of the service (*actually 4 if you count the door bell transformer). Of course all four fuses were the usual 30 amp ones
that we normally see. My theory is that the neutral got mighty hot and that is what was making the smoke. Two days of rewiring and we haven't found anything visibly burnt in the attic.