Fire alarm cables installed beneath a raised floor in an information technology (IT) equipment room aren't required to be plenum rated [300.22(D) and 645.5(D)(5)(c)]. The power source for a fire alarm ...

For example, you can install Class 2 and 3 circuits in the same enclosure as electric light, power, Class 1, and nonpower-limited fire alarm circuits if they are separated by a barrier (Fig. 2).

To meet the “survivability” requirements for certain fire alarm circuits specified in NFPA 72, ... Remee PowerPipe Class 4 Fault-Managed Power Cables. Remee Wire & Cable. Jan. 2, 2024 .

Greg Kessinger is SD&I’s fire alarm and codes expert and a regular contributor. Email him your fire & life safety questions at [email protected]. Have you ever made an embarrassing mistake that ...