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
760.1 Scope. This article covers the installation of wiring
and equipment of fire alarm systems including all
circuits controlled and powered by the fire alarm
system.
FPN No. 1: Fire alarm systems include fire detection and alarm notification, guard's tour, sprinkler waterflow, and sprinkler supervisory systems. Circuits controlled and powered by the fire alarm system include circuits for the control of building systems safety functions, elevator capture, elevator shutdown, door release, smoke doors and damper control, fire doors and damper control and fan shutdown, but only where these circuits are powered by and controlled by the fire alarm system. For further information on the installation and monitoring for integrity requirements for fire alarm systems, refer to the NFPA 72®-2007, National Fire Alarm Code®.
FPN No. 2: Class 1, 2, and 3 circuits are defined in Article
725.
760.2 Definitions.
Abandoned Fire Alarm Cable. Installed fire alarm cable that is not terminated at equipment other than a connector and not identified for future use with a tag.
Fire Alarm Circuit. The portion of the wiring system be- tween the load side of the overcurrent device or the power- limited supply and the connected equipment of all circuits powered and controlled by the fire alarm system. Fire alarm circuits are classified as either non- power-limited or power-limited.
Fire Alarm Circuit Integrity (CI) Cable. Cable used in fire alarm systems to ensure continued operation of critical circuits during a specified time under fire conditions.
Non-Power-Limited Fire Alarm Circuit (NPLFA). A fire alarm circuit powered by a source that complies with
760.41 and 760.43.
Power-Limited Fire Alarm Circuit (PLFA). A fire alarm circuit powered by a source that complies with 760.121.
760.3 Other Articles. Circuits and equipment shall com- ply with 760.3(A) through (G). Only those sections of Ar- ticle 300 referenced in this article shall apply to fire alarm systems.
(A) Spread of Fire or Products of Combustion. Section
through 516 and Article 517, Part IV, where installed in hazardous (classified) locations.
(D) Corrosive, Damp, or Wet Locations. Sections
110.11, 300.6, and 310.9, where installed in corrosive,
damp, or wet locations.
(E) Building Control Circuits. Article 725, where build ing control circuits (e.g., elevator capture, fan shutdown) are associated with the fire alarm system.
(F) Optical Fiber Cables. Where optical fiber cables are utilized for fire alarm circuits, the cables shall be installed in accordance with Article 770.
(G) Installation of Conductors with Other Systems. In stallations shall comply with 300.8.
760.21 Access to Electrical Equipment Behind Panels Designed to Allow Access. Access to electrical equipment shall not be denied by an accumulation of conductors and cables that prevents removal of panels, including suspended ceiling panels.
760.24 Mechanical Execution of Work. Fire alarm cir- cuits shall be installed in a neat workmanlike manner.
Cables