What is the size of a level 3 distribution box

A Level 3 distribution box, such as the Legrand XL3 cabinet, typically accommodates high-current applications with modular configurations, supporting up to 250 A and multiple phases, with dimensions varying by model and configuration.

Overview

A Level 3 distribution box is designed for enhanced safety and service continuity, often used in commercial or industrial settings. These boxes allow complete freedom of distribution, supporting traditional cabling and modular power connections for three-phase systems (L1, L2, L3, N) and can handle currents from 400 A up to 6300 A depending on the enclosure and internal modules used .

Typical Dimensions

While exact dimensions depend on the manufacturer and configuration, Level 3 distribution boxes generally have:

• Height: 1200 mm to 2000 mm
• Width: 600 mm to 1200 mm
• Depth: 300 mm to 600 mm These dimensions allow for multiple modules, busbars, and protective devices while maintaining accessibility for maintenance and wiring .

Features

• Modular design: Supports insertion and withdrawal of functional units without interrupting live circuits.
• High IP ratings: Often IP44 to IP67 for protection against dust and water ingress.
• Material: Typically made from metal or high-density polyethylene for durability and corrosion resistance .
• Mounting: Can be wall-mounted or floor-standing, with risers and anti-flotation adapters for inspection and leveling .
• Capacity: Supports multiple outgoing circuits with space for future expansion, including MCBs, RCDs, RCBOs, and surge protection devices .

Applications

Level 3 distribution boxes are suitable for:

• Industrial power distribution
• Commercial buildings with high electrical loads
• Integration with automation systems
• Environments requiring high safety and service continuity

Summary

A Level 3 distribution box is a high-capacity, modular electrical enclosure designed for three-phase systems, offering flexibility, safety, and scalability. Exact dimensions vary by manufacturer and configuration, but typical units range from 1200–2000 mm in height, 600–1200 mm in width, and 300–600 mm in depth, supporting currents up to 250 A or higher depending on the internal modules and application .