Distribution box dimensions height width thickness

Distribution boxes typically range in height from 75 mm to 2200 mm, width from 105 mm to 1800 mm, and depth (thickness) from 75 mm to 600 mm, depending on type and application.

Standard Wall-Mount and Freestanding Sizes

Wall-mounted distribution boxes usually have dimensions ranging from 200 × 200 × 120 mm up to 800 × 600 × 300 mm (Height × Width × Depth), suitable for small to medium electrical installations . Freestanding cabinets, often used in industrial or power distribution systems, are larger, with typical dimensions of 1600–2200 mm in height, 600–1800 mm in width, and 300–600 mm in depth .

Plastic and Modular Distribution Boxes

Plastic distribution boxes, such as the MB-ABC series, have smaller dimensions suitable for residential or light commercial use. For example:

• MB-ABC500: 95 mm height × 200 mm length × 174 mm width
• MB-ABC700: 95 mm height × 255 mm length × 172 mm width
• MB-ABC900: 95 mm height × 328 mm length × 172 mm width Other series like HA, HK, and LGD range from 75–140 mm in height, 100–415 mm in length, and 105–323 mm in width .

Embedded and Frame Sizes

For embedded or flush-mounted boxes, dimensions vary depending on the number of elements (switches or breakers):

• Single-phase six-element box: Outer frame 860 × 840 × 170 mm, embedded wall 790 × 750 × 110 mm, leaving hole 810 × 770 × 120 mm
• Single-phase four-element box: Outer frame 610 × 840 × 170 mm, embedded wall 550 × 750 × 110 mm, leaving hole 570 × 770 × 120 mm
• Single-phase three-element box: Outer frame 850 × 550 × 170 mm, embedded wall 790 × 490 × 110 mm, leaving hole 810 × 510 × 120 mm
• Single-phase two-element box: Outer frame 610 × 550 × 170 mm, embedded wall 550 × 490 × 110 mm, leaving hole 570 × 510 × 120 mm

Key Considerations

• Height, width, and depth are usually listed as external dimensions; internal usable space is slightly smaller due to wall thickness, hinges, and mounting hardware .
• The number of switches, breakers, or ways affects the required size, and larger incoming lines or higher power ratings may require deeper or wider boxes .
• Always verify the technical drawing before installation to ensure proper fit and cable management . These ranges cover most residential, commercial, and industrial distribution boxes, but specific models may vary by manufacturer and series.