Permanent Audio System Installations

Loudspeakers of permanent audio systems that are installed in fire resistance-rated partitions, walls, or ceilings shall be listed for the purpose or installed in an enclosure or recess that _____.

a) maintains the fire-resistance rating
b) is no more than 4 in. deep
c) is no more than 6 ft - 6 in. high
d) all of the above

See answer and applicable Code reference

The correct answer is: a) maintains the fire-resistance rating

The Code requirements for permanent audio system installations are outlined in Part II of Art. 640 of the 2011 NEC. As noted in 640.25, "Loudspeakers installed in a fire resistance-rated partition, wall, or ceiling shall be listed for that purpose or installed in an enclosure or recess that maintains the fire resistance rating."