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The NEC requires fire alarm system(s) and the cable for fire alarms to be listed. Fire resistant cable is required and most of the systems are 18 awg on larger systems 16awg . The cable has a high temp rating that outlasts standard Romex or nmb, I have seen this cable intact after a fire where thhn in conduit melted. Pulling a separate wire would be a ...


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Even if the wire ends up only having a low voltage on it, it will be terminated and spliced in the same electrical boxes as the white and black high voltage wires, so it's going to come down to the same rules as any other wire in the circuit. Using 14/3 is the only right way to do this, unfortunately. There is an exception for running a ground wire along a ...


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