Middle Atlantic MPR J-Box: End-of-Raceway Cable Management for MPR Systems

The Middle Atlantic MPR J-Box is a compact, rugged enclosure designed to sit at the end of an MPR raceway, delivering a clean, professional solution for routing electrical and data cables. With practical knockouts and a sturdy steel construction finished in a sleek black, this J-box is built to withstand the rigors of AV installations, corporate offices, classrooms, and home theater setups. Its 6" depth, 6" width, and 3" height provide a balanced footprint that fits neatly onto the end of MPR raceways while still offering accessible cable entry points to simplify wiring runs. Whether you’re expanding a preexisting rack system or designing a new, scalable infrastructure, the MPR J-Box helps you maintain a tidy, safe, and organized installation. The optional end-cap design ensures a seamless, professional appearance, reducing visible cables and improving overall site aesthetics. Designed to integrate with Middle Atlantic’s MPR family, this J-box delivers reliable performance without compromising the modular flexibility that modern AV and IT environments demand.

• End-of-raceway compatibility: Specifically engineered to fit on the end of an MPR raceway, the MPR J-Box provides a dedicated junction point for cables, power, and data runs. Its form factor is optimized to maintain a clean line from raceway to equipment, helping you preserve professional cabling aesthetics across your installation.
• Electrical knockouts for flexible entry: Equipped with electrical knockouts to accommodate a range of entry options, the J-Box supports a variety of conduit and cabling configurations. This feature enables swift, flexible wiring during installation and future reconfigurations without compromising safety or organization.
• Robust steel construction with a black finish: The J-Box is manufactured from durable steel, delivering long-lasting protection for connections and terminations. The black finish not only looks stylish but also helps resist visible wear in high-traffic environments, making it suitable for both commercial and residential settings.
• Compact yet capable dimensions: Measuring 6 inches in depth, 6 inches in width, and 3 inches in height, this J-Box provides a compact enclosure that fits neatly on the end of an MPR raceway. The balanced dimensions strike a practical balance between internal space for wiring and external form for a clean appearance at the end of a run.
• Part of a modular power and data strategy: As a member of the Middle Atlantic MPR family, the J-Box supports scalable, modular cabling strategies. It’s designed to work with existing MPR raceways and accessories, enabling you to extend or reconfigure your system with minimal disruption and maximum future-proofing.

Technical Details of Middle Atlantic MPR J-Box

• Dimensions: 6 inches deep (D) × 6 inches wide (W) × 3 inches high (H).
• Material: Steel construction for durability and reliable protection of inside wiring.
• Finish: Black coating for a sleek, professional appearance that blends with most AV furniture and rack systems.
• Knockouts: Electrical knockouts included for flexible cable entry options.
• Mounting compatibility: Designed to fit at the end of Middle Atlantic MPR raceways to maintain clean cable management and seamless integration.
• Intended use: Ideal for end-cap applications where cables need to transition from the raceway to outlets, devices, or other equipment within a rack or AV cabinet ecosystem.

How to install Middle Atlantic MPR J-Box

Installing the MPR J-Box is straightforward, designed to minimize downtime and maximize cable organization. Before you begin, ensure power to the installation area is turned off and that you have the appropriate mounting hardware and tools for securing the enclosure to the end of your MPR raceway. Align the J-Box with the end of the raceway so that the knockouts line up with your planned cable entries. Use the supplied or compatible mounting hardware to secure the J-Box firmly in place, ensuring a stable connection and preventing movement that could stress cables. Once mounted, plan your cabling routes to minimize bending radius and keep return paths clear of obstructing components. Open the desired knockouts, install conduit adapters or cable entry fittings as needed, and route power and data wires into the enclosure. Close and terminate conductors according to applicable electrical codes and standards, keeping a clean, organized interior to facilitate future inspections or reconfigurations. Finally, if you’re using an end-cap, attach it to complete the streamlined appearance and reduce visible cabling. Regularly inspect the enclosure for wear or loosened fittings, especially in high-traffic environments, and perform routine maintenance to preserve performance and safety over time.

Frequently asked questions

• Q: What is the MPR J-Box designed to fit? A: It is specifically designed to fit the end of an MPR raceway, enabling a clean transition for cables entering or leaving the raceway system.
• Q: What entry options are available? A: The J-Box includes electrical knockouts to accommodate a variety of conduit and cabling entries, providing flexible installation options.
• Q: What is the material and finish? A: The enclosure is constructed from steel and finished in black, combining durability with a modern, professional appearance.
• Q: What are the dimensions? A: The enclosure measures 6 inches deep by 6 inches wide and 3 inches high, offering a compact profile suitable for end-of-raceway installations.
• Q: Can this J-Box be used with other raceways beyond MPR? A: This J-Box is specifically designed for the MPR raceway system to ensure optimal compatibility, fit, and performance within that modular ecosystem.