Originally Posted by hbiss
Originally Posted by Mercenary Roadie
Not all space above a drop ceiling is a plenum.

As a LV contractor you are supposes to KNOW how to tell or where to find out when the space above a hung ceiling is used as an air handling space. Depending on the size of the job this can save you a lot of money if you don't have to use a plenum listed cable.

Yes, you are correct and as an LV contractor, this is a constant discussion I seem to have with people who should know better and think all space above a drop ceiling is plenum yet they don't think space below a false floor can be a plenum.


Patrick T. Caezza
Santa Paula, CA 93060
C-7 - Low Voltage System Contractor - Lic# 992448