1. (a) All cabling shall conform to the latest industry standards applicable to the specific system at the time of installation.

2. (b)

   1. (1) Cabling not installed in a closed conduit system should be specified to be plenum rated cabling regardless of whether the space is a return air plenum or not.
   2. (2) This will eliminate the need to replace the cabling system if the HVACR system is renovated to a return plenum system.
   3. (3) In addition, plenum rated cabling generally develops less smoke and has a reduced flame spread in the event of a fire, thus improving the fire safety of the building.

Codification Notes: "HVACR" means heating, ventilation, air conditioning, and refrigeration.