We have to run smoke detectors in a commercial building in Greensboro, existing, not new. I have no problems with the wiring of these but what I do not know is what type of wire do I have to use to be in code.
Can I use just 14/3 NM or does it have to be the armored cable?(at least that is what I think it is called)
Can I use just 14/3 NM or does it have to be the armored cable?(at least that is what I think it is called)