Is there a code of standard that states a minimum distance of separation for outgoing and return conductors for Class A Fire Alarm Circuits?
I have checked NFPA72 18.104.22.168.2, 22.214.171.124-6.7
Outside of requiring the outgoing and return conductors to be routed separately, NFPA72 does not state minimum distances and pretty much says it is up to the designer/installer and to take the use of the building and hazards into consideration when routing the signaling path.
Is there another document or code to reference? NFPA70(NEC) only sets requirements for separation from non-fire alarm circuits 760.136