I have a two bedroom cape with 14-3 running to the second floor where it splits. I noticed at the panel some time much later that the two 15 amp breakers that power up the individual rooms, are separated by a 20 amp breaker that feeds a designated circuit. The 14-3 neutral is carrying the return load of both 15 amp circuits from the same leg.
The electrician was qualified and licensed. Shouldn't he have moved the two 15 amp circuit breakers together so that they would be pulling from separate legs? I am trying to better understand this.