Is running a shielded twisted pair communications cable (CAN-bus operating at 5-24vdc) along with a SO cord 18/3 (operating at 3A - 120VAC) inside the same liquid tight flexible nonmetallic conduit (LFNC) a legal installation with respect to NPFA70-2005? With respect to NPFA79-2007?
Unless all conductors, not cables, are rated for the maximum voltage in use within the raceway, then this type of installation isn't permitted. My question would be how these circuits are separated at the ends of the liquid-tight since any approved enclosure would have separate high and low-voltage compartments?
I'd go with the shielded communications cable routed outside of the liquid-tight and run THHN, etc. inside.
Communications wiring and Power wiring are not permitted in the same raceway I don't care what the insulation ratings are. Article 800 Section 800.133 NFPA70 2005 Edition.
Here we go with terminology.
CAN bus is normally used for interconnecting automation devices which is is probably a 725 remote-control and signalling application. 725.55(D) and 725.55(E) have provisions for mixing Class 2 and Class 3 circuits with other wiring.
Article 800 is for "central station systems" like telephones. However, 830 address networks so 830.133(A)(1)(d) Excpt #1 may be applicable.
Greg- The original post only said Communication cable which put me in Article 800. I don't really know what CanBus is and maybe you are correct. Don't sound to me like 725 is even involved. Maybe I don't know what I'm talking about. The Scope of 800 is Communication Circuits and so that's where I went. Straighten this old man out