Chief CMA473 XL Plenum Rated Storage Box

Overview

The Chief CMA473 is a plenum rated storage box designed to provide a secure and organized space for power bricks, extenders, and extra cables in suspended ceiling installations. It fits seamlessly with Chief CMS440 and CMA440 ceiling kits, allowing installers to maintain a clean and professional appearance by hiding equipment above the ceiling tile. Its UL listing for air-handling spaces ensures compliance with strict building codes commonly found in offices, classrooms, healthcare facilities, and government buildings.

Key features

• Plenum rated design allows safe installation in air-handling spaces without additional fire-rated enclosures
• Low-profile housing with a flat, removable lid for easy access and installation in tight ceiling spaces
• Multiple knockouts sized at 0.5-inch and 1.5-inch enable precise routing of power and data cables
• Interior accommodates two dual-gang surface-mount electrical boxes for mounting receptacles or low-voltage plates alongside equipment
• Compatible with Chief CMS440 and CMA440 suspended ceiling kits for a streamlined installation process
• TAA compliant, making it suitable for government and institutional projects
• Helps protect cables from damage and keeps equipment secure while maintaining a tidy ceiling appearance

Key specs

• Plenum rating: UL listed for use in air-handling spaces
• Compatible ceiling kits: Chief CMS440 and CMA440
• Knockout sizes: 0.5-inch and 1.5-inch
• Electrical box capacity: Supports two dual-gang surface-mount boxes
• Compliance: TAA compliant for government and institutional use

Installation and setup

The slim design of the CMA473 allows it to fit comfortably in tight spaces above suspended ceilings. Its flat, removable lid simplifies hardware placement and servicing without the need to maneuver around bulky covers. The strategically placed knockouts facilitate neat cable management, ensuring power and data lines are routed exactly where needed. This thoughtful design reduces installation time and helps maintain a clean, professional look in any environment.

Ideal uses and environments

This storage box is well suited for environments that require strict adherence to building codes, such as offices, classrooms, healthcare facilities, and government buildings. It is an excellent choice for AV technicians, IT staff, and facilities managers who need to keep power supplies and cables secure and out of sight while maintaining easy access for maintenance. The CMA473 fits well in any setup where suspended ceilings are used and a neat, code-compliant installation is essential.