Using *12/4 armor cable in residential wiring ?
Q.
I am heavily involved in electrical construction for residential/commercial building.
Using 120/208V single phase 3-wire system to the apartment/condo with #6/3 armor cable, and apartment CB Panel is 1-phase, 3- wire 8/16 GE.
Is it possible to use a 12/4 armor cable in branch wiring ?
Is there be a violation of NEC ?
Is color coding cable in armor wiring is acceptable by NEC?
If there will be a color coding, making 2 neutral cable in one armor jacket is possible?
NOTE : As of my experties, and experience, the questioned armor cable is a violation of NEC and technically it's not permitted because of 2 neutral parallel in one jacket.
Appreciated for quick answer!!
Raj