Offers six trade size conduit knockouts in 0.5", 1", 1.5" (12, 25, 38 mm)

The Chief CMA474 SYSAU Plenum Storage System features a scalable Plenum-rated enclosure that fits AV equipment and a shift enclosure along Tile Bridge that avoids Plenum interferences. Its removable covers enable side access in shallow Plenum spaces and full access from above. The CMA474 offers six trade size conduit knockouts in 0.5", 1", 1.5" (12, 25, 38 mm). Flexible conduit knockouts allow high voltage conduit to pass through plenum box when the power is facing into the room below.