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Dimensions of the secondary distribution box length and width

Dimensions of the secondary distribution box length and width

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Dimensions of the secondary distribution box length and width - BENNIE OPTICAL [PDF]

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Secondary distribution boxes typically range from 200–328 mm in length, 172–174 mm in width, and 95 mm in height, depending on the model.

Typical Dimensions

For example, the MB-ABC series of plastic secondary distribution boxes provides the following dimensions :

  • MB-ABC500: Length 200 mm, Width 174 mm, Height 95 mm
  • MB-ABC700: Length 255 mm, Width 172 mm, Height 95 mm
  • MB-ABC900: Length 328 mm, Width 172 mm, Height 95 mm These boxes are made of flame-resistant ABS plastic and are designed for modular installation in residential, commercial, and industrial settings. They comply with standards such as BS EN60439-3 and JB/T7121-93, ensuring safety and durability .

Measurement Guidelines

When measuring a secondary distribution box:

  • Length (L): The longest side of the box base
  • Width (W): The shorter side of the box base, perpendicular to the length
  • Height (H): The vertical distance from the base to the top of the box These dimensions are critical for proper installation, ensuring the box fits within allocated spaces and aligns with electrical conduits or mounting surfaces.

Additional Considerations

  • Secondary distribution boxes can be fitted with terminal blocks for custom wiring and modular connections .
  • Powder-coated finishes or metal enclosures may slightly alter external dimensions compared to plastic models.
  • For larger or specialized SDBs, dimensions may vary significantly, so always refer to the manufacturer's datasheet for the specific model. By using these measurements, you can plan installation, ensure compatibility with other electrical components, and optimize space in switchgear rooms or distribution panels.
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