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Module of xxm type distribution box

Fiber and communications infrastructure knowledge brief Published 10 May 2025

Use this reference to prepare product questions for CJC FIBRE. Check interfaces, capacity, protection and installation requirements against the current product documentation.

The XXM type distribution box is a modular low-voltage electrical distribution enclosure designed for safe power and lighting distribution with overload, leakage, and short-circuit protection.

Overview

The XX

M distribution box is a terminal combination electrical distribution box suitable for both single-phase and three-phase circuits with a frequency of 50Hz, rated voltage below 400V, and load current up to 100A. It is widely used in residential buildings, high-rise buildings, hotels, shopping malls, hospitals, factories, and industrial sites.

Structural Features

Modular Design: Components can be freely assembled, allowing flexible configuration based on the number of circuits and electrical components. Material: Constructed from cold-rolled steel plates with built-in mounting plates for durability and safety. Internal Safety: Features internal isolation and protection measures to ensure safe operation.

Mounting Options: Can be surface-mounted or recessed, with detachable color-coated mounting plates for easy installation and maintenance. Door Design: Equipped with precision-cast adjustable hinges, opening beyond 135°, reinforced with welded stiffeners, and a concealed sealing edge for a neat appearance.

Protection Functions

The XX

M box provides overload, leakage, and short-circuit protection, making it suitable for both lighting and motor control applications. Optional inner door mounting brackets and knockouts on top and bottom walls facilitate cable and conduit installation.

Variants

The XX

M series includes: Universal typeOutdoor typeTransparent window type These variants allow customization for different environmental conditions and monitoring needs.

Technical and Environmental Specifications

Altitude: Below 1000mAmbient Temperature: -25 ℃ to 40 ℃, with a 24-hour average not exceeding 35 ℃Wind Speed: Up to 35 m/sRelative Humidity: Not more than 90% at 25 ℃Seismic Resistance: Horizontal acceleration ≤ 0. 4 m/s², vertical ≤ 0. 2 m/s²Installation Site: Free from conductive dust, corrosive, flammable, or explosive materials, and minimal vibration; vertical slope ≤ 3°.

Applications

The XX

M distribution box is suitable for: Lighting and power distribution in residential and commercial buildingsControl systems such as air conditioning, water pumps, fans, and machine toolsIndustrial and mining enterprises requiring safe and organized electrical distribution.

Compliance

The product conforms to IEC439 (low-voltage switchgear and control equipment) and GB7251. 3 (low-voltage switchgear) standards, ensuring reliability and safety in electrical installations.

The XX

M type distribution box is a versatile, modular solution for modern electrical distribution needs, combining safety, flexibility, and ease of maintenance.

Module of xxm type distribution box - CJC FIBRE CONSULTANTS [PDF]

Module of xxm type distribution box

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Technical note

This reference is intended for preliminary fiber and communications infrastructure research. Optical interface, fiber type, port or core capacity, electrical input and output, enclosure protection, cooling, installation limits and applicable standards must be verified for the specific project.

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