I followed your description and drew it on paper. It works, but it's a strange looking thing! Power to the load always flows on the link between the 2 commons.A true California 3 way is compliant as it never switches the neutral which is always connected to the shell of the light socket.
It is wired with the hot wire connected to a traveler terminal in both switches and the load is connected to other traveler in both switches. The commons are connected together. The neutral is wired to the fixture neutral. It only requires 2 wires between the switches, the common to common conductor and the load conductor.
As long as the neutral is is present in both switch boxes it is compliant.
I would never use it because it confuses the hell out of me.
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Except when the load is turned off.Power to the load always flows on the link between the 2 commons.
True, the hot and neutral at each box are connected to the travelers. One common is wired to the shell of the lamp, the other wired to the center pin.I have always known the Carter as a three-way that reverses the lampholder polarity, depending upon the switch position.
And just WHY does 300.3(B)(3) NOT allow 14/2 NM to be wired as my little post-it diagram illustrates?I see how that works, but don't see it complying with 300.3(B) unless you route the two separate cables in close proximity to one another, and even then there is going to be some debate as to whether that complies.