Above Ceiling Plenum Box

602 2 of imc would allow plenum enclosure to be made of wood in this case because the building can be constructed with exposed wood framing.

Above ceiling plenum box.

These boxes are available with and without an option for mounting a projector. If the return air for the above ceiling hvac unit is not ducted directly to the grid ceiling and it is pulled through a ceiling register with no duct work then the space is being used as a plenum or for environmental air. However some drop ceiling designs create a. 2 x 2 above suspended ceiling storage box.

For a new way to hide clutter look up to the new evolution series ceiling boxes. View from below the acoustical ceiling with some ceiling panels removed to show the plenum barriers above partitions that terminate at ceiling height. In these areas metal wiring methods are required per nec 300 22 c. Space between the structural ceiling and the dropped ceiling or under a raised floor is typically considered plenum.

The receptacle should not be permitted in this location. The plenum barriers block noise that would otherwise transmit through the ceiling and over the top of partition. Not all above ceiling spaces are considered a plenum. If the space above the drop ceiling is used for environmental air transfer meaning the air above the drop is apart of the air return then it is a plenum area and plenum rated cables shall be installed.

A plenum space is a part of a building that can facilitate air circulation for heating and air conditioning systems by providing pathways for either heated conditioned or return airflows usually at greater than atmospheric pressure. They offer localized mounting for a v and technology equipment in a plenum approved enclosure. You cannot put any combustible materials in these spaces unless they are listed for the application.