Dimensions of an empty maintenance distribution box

A typical empty maintenance distribution box measures approximately 340 mm (H) × 560 mm (W) × 350 mm (D) and weighs around 7.3 kg.

Standard Dimensions

One commonly referenced model, the PCE Merz M-SVE 4 empty distribution box, has the following dimensions: Height: 340 mm, Width: 560 mm, Depth: 350 mm, with a weight of approximately 7.3 kg . These dimensions are suitable for building a custom distribution setup with sockets up to 63 A and connector plugs up to 32 A, all protected by the housing frame .

Material and Protection

Empty distribution boxes are typically made from plastic or aluminium, with lids made of polycarbonate for durability and visibility. Many models are rated IP65, providing protection against dust and water ingress, making them suitable for both indoor and protected outdoor installations . Some boxes are certified for chemical resistance, such as ammonia, which is relevant for industrial environments .

Variations

Distribution boxes come in a range of sizes depending on the number of ways (1-way to 36-ways) and amperage capacity. Smaller residential boxes may be more compact, while industrial or high-amperage boxes can exceed the dimensions above to accommodate larger busbars and breakers . For example, aluminium or copper boxes designed for 300 A can be significantly larger than standard plastic enclosures .

Practical Considerations

When selecting a maintenance distribution box, consider:

• Amperage rating: Ensure the box can handle the maximum current of your system.
• Mounting space: Verify wall or panel space to accommodate the box dimensions.
• Future expansion: Choose a box with extra space for additional circuits or upgrades.
• Environmental protection: IP rating and material choice should match indoor or outdoor conditions. These factors, combined with the standard dimensions, help ensure proper installation, safety, and long-term usability of the distribution box.