Vertical deviation of distribution box installation
The vertical deviation of a distribution box during installation should not exceed 3mm.
Installation Requirements
When installing a distribution box, it must be firmly fixed, both horizontally and vertically, to ensure proper alignment and safe operation . Specifically, the vertical deviation should not be greater than 3mm. This applies to both concealed and exposed installations. For concealed installations, the box should be embedded in the wall with no gaps around it, and the edges of the panel should be flush with the wall. The contact surfaces between the box and the building structure should be coated with anti-corrosion paint to prevent deterioration .
Fixation Methods
- Concealed Installation: The box is embedded in a reserved wall hole slightly larger than the box dimensions. Concrete or mortar is used to fill the gap between the box and the wall to secure it .
- Exposed Installation: The box can be fixed using open-foot bolts or expansion bolts, with the bolt length calculated based on the box thickness, nut and washer thickness, plus an additional 5mm for secure anchoring .
Additional Considerations
- Ensure the box is level and plumb before final fixation.
- Verify that the box edges are close to the wall to avoid gaps that could compromise safety or aesthetics.
- Apply anti-corrosion coating to all contact points with the building structure.
- Follow all relevant electrical codes and standards to maintain safety and compliance . Maintaining the 3mm vertical deviation limit is crucial for proper alignment of internal components, safe wiring connections, and long-term stability of the distribution box.
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