Modular Flush-Mount Distribution Box Legrand PRACTIBOX S 3x12 with White Door (model 135363)

Legrand PRACTIBOX S modular flush-mount distribution box 3x12 with white door is a recessed enclosure designed to accommodate three rows of up to 12 DIN-modular devices per row. Intended for residential and light-commercial electrical installations, this distribution box provides a structured space for mounting miniature circuit breakers, residual current devices and other DIN-rail mounted protection and control modules while keeping wiring concealed behind a flush white door for a neat finish.

Advantages

The enclosure combines a compact flush-mounted design with modular flexibility, allowing installers to configure circuits across three rows without protruding elements. The white door offers a discreet visual integration into interiors and protects internal components from dust and accidental contact. Constructed for standard installation practices, the box simplifies wiring organization and maintenance by providing clear separation of modules and access via the front door.

Suitable for

• Housing miniature circuit breakers and residual current devices in apartments and houses
• Small commercial or office electrical distribution panels
• Neat concealment of consumer units in renovation and new-build projects
• Installations requiring a recessed distribution board with a clean aesthetic

Key specifications

• Configuration: 3 rows x 12 modules per row (3x12)
• Mounting type: Flush / recessed installation
• Front: White door for concealed access
• Compatibility: Designed for standard DIN-rail modular devices (MCBs, RCDs, terminal blocks)
• Access: Front-opening door for wiring inspection and maintenance
• Application: Residential and light commercial electrical distribution

How to use

Install the flush-mount distribution box into a prepared wall cavity following local electrical codes and standard mounting procedures. Secure the enclosure within the wall, fit the DIN rails and mount the required modular devices across the three rows. Route and connect circuit conductors to the installed protection devices and terminals, ensure all connections are tight and correctly labeled, then close the white door to conceal the internal wiring. Access for inspection or maintenance is achieved by opening the front door.

Usage recommendations

For safe and code-compliant operation, installation and wiring should be performed by a qualified electrician. Verify compatibility of chosen DIN-rail devices with the available module count and spacing, and maintain adequate clearance around the recessed box according to local regulations. Regular inspections of connections and protective devices are recommended.