Mixing Conductors of Different Circuits

Fire alarm circuit conductor rules as noted in the 2011 NEC

March 10, 2014

Generally speaking, the NEC states that conductors for lighting or power may occupy the same enclosure or raceway with conductors of power-limited fire alarm circuits.

a) True
b) False

See answer and applicable Code reference

This statement is: b) False

As noted in Section 760.136(A) of the 2011 NEC, "power-limited fire alarm circuit cables and conductors shall not be placed in any cable, cable tray, compartment, enclosure, manhole, outlet box, device box, raceway, or similar fitting with conduictors of electric light, power, Class 1, non-power-limited fire alarm circuits, and medium-power network-powered broadband communications circuits unless permitted by 760.136(B) through (G)."