I am in a new-to-me house built in the 1970s. We are on the 2014 NEC.
I have two long living rooms, one with the ceiling fan improperly wired, and one without a fan at all.
I would like to have in each room one ceiling fan with the fan and light controls separate. This is a common request and easy to find plans for. What I would like to do in addition is to have three way switches for both the fan and light. Imagine a long room with the fan in the middle and at each end a two gang box with one switch for fan and one for the light. This is not easy to find plans for.
I have drawn up a simple plan as to how to do this like simple 3-way switch wiring but don't know if this is acceptable.
Most of the things I have read to this point state that this is not OK as when only the fan or only the light is in use, some current would be flowing through the neutral wires in each cable between the three way switches, which is not allowed.
I am wondering if this wiring setup is compliant with the 2014 NEC. If not, I ask why not, and what would be an appropriate way of wiring this.
The current source cable is at a wall switch box but could be moved to the ceiling fan box if necessary.