760-Fire Alarm Systems
I. General
300.21. The accessible portion of abandoned fire alarm cables shall be removed.
(B) Ducts, Plenums, and Other Air-Handling Spaces. Section 300.22, where installed in ducts or plenums or other spaces used for environmental air.
Exception: As permitted in 760.53(B)(1) and (B)(2) and
760.154(A).
(C) Hazardous (Classified) Locations. Articles 500