from 5839 2017
It is now common practice for the transmission of fire alarm signals to an ARC to be routed via the alarm routing
equipment of an intruder alarm system. Notwithstanding that the mains power supplies, cable types and cable
routing for this alarm routing equipment might not necessarily conform to the recommendations of this part of
BS 5839, this practice is regarded as acceptable and need not be regarded as a variation from the recommendations
of this standard. However, standby battery capacity and any cable between the CIE and the alarm routing
equipment needs to conform to the recommendations of this part of BS 5839.