Fill in the blank with the correct answer.
When installing loudspeakers in fire resistant-rated partitions, walls, and ceilings, the loudspeakers shall be ________.

  1. approved
  2. listed for the purpose
  3. installed in an enclosure or recess that maintains the fire resistance rating
  4. listed for the purpose or installed in an enclosure or recess that maintains the fire resistance rating

Answer: D

As noted in 640.25 of the 2011 NEC, when installing loudspeakers in fire resistance-rated partitions, walls, and ceilings, the loudspeakers shall be listed for the purpose or installed in an enclosure or recess, that maintains the fire resistance rating.

Owen is the owner and president of National Code Seminars and the holder of master electrician certifications in 46 states. He can be reached at necexpert@aol.com.