Chief CMA474 SYSAU Plenum Rated Storage Box

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Product ID: 18851
List Price: $236.00
Our Price: $171.20
Shipping: $12.95 *
* applies to Contiguous United States


Chief CMA474 plenum storage system scales and shifts to fit AV equipment and avoid plenum obstructions. Only compatible with the SYS Suspended Ceiling Projector System.

Technical Drawing

Technical Drawing for Chief CMA474 SYSAU Plenum Rated Storage Box


Certifications UL Listed
Color White
Notes Collapsed Width 12" (305 mm)
Overall Dimensions (H x W x D) 5.38 x 22 x 13" (137 x 559 x 330 mm) (expanded dimensions)
Weight Capacity 35 lbs (15.9 kg)


  • Plenum-rated enclosure is scalable to fit AV equipment

  • Shift enclosure along tile bridge to avoid plenum interferences

  • Removable covers enable side access in shallow plenum spaces and full access from above

  • 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.

  • Compatible with SYS Suspended Ceiling Projector System

Model CMA474
Manufacturer Chief Mounts
Part Number CMA474
UPC 841872167503
Color White
Overall Dimensions 5.38 x 22 x 13" (137 x 559 x 330 mm) (expanded dimensions)
Weight Capacity 35 lbs (15.9 kg)

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Chief CMA474 SYSAU Plenum Rated Storage Box


With the exception of electrical products, Chief warrants its products to be free of defects in material and workmanship for 10 years. All warranties are in effect beginning the date the product was invoiced by Chief. Electrical mechanisms (such as lift products) have a 1-year limited warranty. All warranties are in effect for the original purchaser only. Chief disclaims liability for any modifications, improper installation and/or installations over the specified weight capacity. Chief also disclaims liability for any modifications made to electrical mechanisms, improper installation, incorrect voltage connection and/or installations over the stated weight capacity. All Electrical Mechanisms are intended for indoor use only and failure to comply will void warranty.

Chief's sole warranty obligation to the owner of its products is to repair or replace (at Chief's discretion) defective products at no charge to the original purchaser within the warranty period. The purchaser is responsible for returning the product to Chief Manufacturing via prepaid shipping. To the maximum extent permitted by applicable law, Chief disclaims any other warranties, express or implied, including warranties of fitness for a particular purpose and warranties of merchantability. Chief will not be liable for any damages whatsoever arising out of the use or inability to use Chief products, even if Chief has been advised of the possibility of such damages. Chief bears no responsibility for incidental or consequential damages. This includes, but is not limited to, any labor charges for the repair of Chief products performed by someone other than a Chief employee. Because some states and jurisdictions do not allow the exclusion or limitation of liability for consequential or incidental damages, the above limitation may not apply. Chief will not be responsible for damage to Chief products caused by misuse, abuse, failure to properly package the product for return to Chief or for damage caused by carriers during shipment to or from Chief. Any repairs to Chief products required due to misuse, abuse or shipping damage or repairs of defective Chief product outside the warranty period will be performed at the current rates established by Chief for factory service.