I'm the GC on the renovation of a 1780 post&beam farmhouse.
Currently have some disagreement on the job site. Some feel that because communication wiring is run in the unblocked wall from basement to 2nd floor, riser rated cable is required. Others disagree and state the NEC indicates type CM is always sufficient for single family residential dwellings.
Can somebody point me one way or the other.
As about 50% of the place is already wired in CM, we are hoping this meets the NEC, but will rewire if required.