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Standard Table of Process Distribution Box Dimensions

Fibre interconnection and data room reference Published 20 Dec 2025

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

Distribution boxes come in standardized dimensions based on type, material, and number of ways, with typical lengths ranging from 100–415 mm, widths from 105–428 mm, and heights from 60–140 mm.

Plastic Distribution Boxes

Plastic distribution boxes, commonly made of flame-resistant ABS, are widely used for modular AC circuits (220V/380V) and comply with standards like BS EN60439-3 and JB/T7121-93. Typical dimensions for MB-AF series boxes are: Type / WaysHeight (H1/H2/H3 mm)Length (L mm)Width (W/W1 mm)MB-AF 6 ways60 / 74 / 99. 5185141 / 130MB-AF 8 ways60 / 74 / 99.

5230175 / 165. 2MB-AF 12 ways60 / 74 / 99. 5308209 / 200.

2MB-AF 16 ways59 / 73 / 103233290 / 279. 2MB-AF 24 ways59 / 73 / 103314344 / 333. 2MB-AF 36 ways59 / 73 / 103314410 / 428.

7Other series like MB-ABC, MB-AS, and MB-LF have lengths from 200–328 mm, widths 172–174 mm, and heights 95 mm. Metal / Outdoor Distribution BoxesFor outdoor or industrial applications, metal distribution boxes are typically fabricated from 2 mm GI sheet steel with reinforced channels, slanted roofs, and IP-55 protection. Dimensions are generally customizable, but standard tolerances allow ±10% over the specified size.

These boxes accommodate bus bars, MCCBs, and cable glands, with provisions for earthing and secure locking systems. Industrial Connector Distribution BoxesIndustrial-grade boxes, such as Amphenol LTW series, are designed for M8/M12 connectors and automation systems. They offer IP67 protection, vibration resistance, and pre-wired configurations.

Standard lengths for cable runs are 1M, 2M, 3M, 4M, 5M, and 10M, with customization available upon request.

Key Considerations

Material: Plastic (ABS) for indoor modular use; GI steel for outdoor/industrial use. Protection Rating: IP55 for outdoor metal boxes; IP67 for industrial connector boxes. Number of Ways: Ranges from 1-way to 36-ways depending on series.

Mounting: Provision for wall or panel mounting, with reinforced channels for stability. Customization: Many manufacturers allow custom dimensions, cable lengths, and pre-wiring options. These tables and specifications provide a comprehensive reference for selecting distribution boxes based on application, number of ways, and environmental requirements.

Standard Table of Process Distribution Box Dimensions - FD SOLUCIONES OPTICAL SYSTEMS [PDF]

Standard Table of Process Distribution Box Dimensions
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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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