Distribution box | PDF
This document provides specifications for various types of plastic distribution boxes, including their dimensions and features. It
Refer to the table for specifications and dimensions of the distribution box
Distribution boxes come in various types and sizes, with dimensions and features depending on material, number of ways, and application, ranging from compact plastic boxes to large metal LT boxes.
Plastic Modular Distribution Boxes
| Series | Model | Length (mm) | Width (mm) | Height (mm) | Number of Ways | Material | Standards |
|---|---|---|---|---|---|---|---|
| MB-ABC | MB-ABC500 | 200 | 174 | 95 | 1–12 | Flame-resistant ABS | BS EN60439-3, JB/T7121-93 |
| MB-ABC | MB-ABC700 | 255 | 172 | 95 | 1–18 | Flame-resistant ABS | BS EN60439-3, JB/T7121-93 |
| MB-ABC | MB-ABC900 | 328 | 172 | 95 | 1–24 | Flame-resistant ABS | BS EN60439-3, JB/T7121-93 |
| MB-AF | MB-AF Series | 200–328 | 172–174 | 95 | 1–36 | Flame-resistant ABS | BS EN60439-3, JB/T7121-93 |
| HA/HK/LGD | Various | 100–415 | 105–323 | 75–140 | 1–36 | ABS Plastic | Standardized modular design |
Plastic modular boxes are widely used in residential, commercial, and industrial applications for AC 50Hz circuits with rated voltages of 220V/380V. They feature flame-proof, impulse-proof, and excellent insulation properties, with easy installation and dismounting .
TOP Series Industrial Distribution Boxes
| Type | Number of Ways | Length (mm) | Width (mm) | Height (mm) | Material |
|---|---|---|---|---|---|
| TOP-TS | 1–36 | Varies | Varies | Varies | Metal/Plastic |
| TOP-TF | 1–36 | Varies | Varies | Varies | Metal/Plastic |
| TOP-LS | 1–36 | Varies | Varies | Varies | Metal/Plastic |
| TOP-PS | 1–36 | Varies | Varies | Varies | Metal/Plastic |
| TOP-PF | 1–36 | Varies | Varies | Varies | Metal/Plastic |
| TOP-S | 1–36 | Varies | Varies | Varies | Metal/Plastic |
These boxes are designed for industrial and commercial installations, supporting multiple ways and modular configurations .
LT (Low Tension) Metal Distribution Boxes
| Feature | Specification |
|---|---|
| Material | 2 mm GI sheet steel with reinforcement channels |
| Protection | IP-55 |
| Locking | Godrej 3-position lock, optional manual lock |
| Roof | Slightly slanting with 50 mm overhang |
| Earthing | Two solid earthing points |
| Bus Bars | Copper flat 25x4 mm, insulated with phase-colored paint |
| Cable Glands | Heavy-duty, double compression brass |
| Dimensions | Illustrative; tolerances ±10% over specified dimensions |
| Standards | IS 13947 (Pt-2)/1993, CPRI type-tested |
LT distribution boxes are suitable for outdoor installations, providing robust protection, proper bus bar clearance, and compliance with electrical safety standards .
Key Considerations
- Number of Ways: Choose based on the number of circuits or devices to avoid overcrowding.
- Material: Plastic boxes are lightweight and flame-resistant; metal boxes offer higher mechanical strength and outdoor suitability.
- Standards Compliance: Ensure boxes meet relevant standards (BS EN, IS, IP rating) for safety and durability.
- Installation Environment: Indoor vs. outdoor, residential vs. industrial, and future expansion requirements. This table provides a comprehensive overview to help select the appropriate distribution box based on size, material, and application requirements.
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