Xl-Distribution Box Dimensions

XL-21 low-voltage distribution boxes are wall-mounted, steel-enclosed units designed for AC voltages up to 500V, with dimensions varying by configuration and manufacturer.

Overview

The XL-21 series is widely used for low-voltage power distribution in industrial, commercial, and infrastructure applications. These boxes are suitable for three-phase four-wire or five-wire systems, with rated voltages up to 500V and currents typically up to 630A . They are designed for power distribution, lighting control, and power management, and comply with IEC 439-1 and GB7251 standards .

Construction and Installation

• Material: Steel plate with bending for a robust, closed shell .
• Mounting: Wall-mounted, with front maintenance access. The front door opens to allow easy inspection and servicing of internal components .
• Internal Layout: Can accommodate air circuit breakers, fuses, contactors, thermal relays, and optional operation buttons or indicators. The arrangement is flexible, allowing beam or plate-type installation of components .
• Environmental Conditions: Suitable for ambient temperatures from -5°C to +40°C (short-term up to +65°C), relative humidity up to 50% at +40°C, and up to 90% at +20°C. The device should be installed in clean air, free from severe vibration, impact, or chemical corrosion .

Dimensions Considerations

While exact length, width, and height are not specified in the sources, XL-21 boxes are typically modular and customizable, with dimensions depending on the number of circuits, breakers, and internal layout. When ordering, manufacturers often provide Type B or custom structures, and the layout is specified to match installation requirements . For practical purposes, the dimensions are usually provided in manufacturer datasheets or catalogs, which include external measurements, internal usable space, and mounting clearances. It is recommended to consult the manufacturer's PDF catalog or contact the supplier to obtain precise measurements for your specific configuration .

Summary

• XL-21 distribution boxes are wall-mounted, steel enclosures for low-voltage AC systems.
• Rated for up to 500V AC and 630A, suitable for industrial and commercial use.
• Dimensions vary based on configuration, number of circuits, and internal layout.
• Exact measurements should be obtained from manufacturer datasheets or catalogs to ensure proper installation and compliance with space requirements . For installation planning, always allow clearance for front maintenance and ensure environmental conditions meet the specified limits.