A typical 25-channel distribution box has approximate dimensions of 600–650 mm in height, 400–450 mm in width, and 120–150 mm in depth, depending on the manufacturer and model.

General Specifications

Height: 600–650 mm Width: 400–450 mm Depth: 120–150 mm These dimensions are based on standard MCB distribution boxes ranging from 20 to 36 ways, where a 25-way box falls in between the 24-way and 30-way models . The box is usually made of fire-resistant ABS or metal, with a protection rating of IP40 for indoor use, and may include earth and neutral bars for wiring .

Installation Considerations

• Mounting: Wall-mounted or panel-mounted, often with adjustable depth up to 20 mm for alignment .
• Internal Layout: Designed to house 25 miniature circuit breakers (MCBs) with sufficient spacing for safe wiring and heat dissipation.
• Safety Features: Clear labeling for circuits, neutral and earth bars, and adequate spacing to prevent short circuits .

Notes

• Dimensions may vary slightly depending on the manufacturer and whether the box is pre-wired, weatherproof, or designed for industrial vs. residential use .
• For outdoor or high-IP-rated applications, the depth may increase to accommodate sealing and insulation.
• Always verify the exact model specifications from the supplier before installation to ensure compatibility with your electrical system . This provides a practical reference for planning the installation of a 25-channel distribution box while accounting for standard safety and wiring requirements.