Dimensions of low-voltage distribution boxes in Uzbekistan

Low-voltage distribution boxes in Uzbekistan must comply with the Technical Regulations on the Safety of Low Voltage Equipment, covering voltage ratings, labeling, and conformity, though specific dimensional requirements are determined by equipment type and installation standards.

Voltage and Equipment Scope

In Uzbekistan, low-voltage equipment is defined for AC voltages from 50 to 1000 V and DC voltages from 75 to 1500 V. This includes distribution boxes, switchgear, and other electrical devices, but excludes telecommunications equipment . Distribution boxes must be designed to safely house electrical components within these voltage ranges.

Safety and Conformity Requirements

All low-voltage distribution boxes must meet the following regulatory requirements :

• Conformity Marking: Equipment must display a conformity mark confirmed by a certificate of conformity issued according to Uzbek regulations. This mark can be affixed directly to the equipment or its packaging.
• Labeling: Labels must include the manufacturer's name or trademark, equipment type/model, date of manufacture, and energy efficiency class.
• Technical Documentation: Must be provided in Uzbek, including manufacturer details, contact information, and instructions for safe installation and operation. Documentation can be in paper or electronic form.

Dimensional Considerations

While the regulations do not specify exact box dimensions, the size of a low-voltage distribution box is generally determined by:

• The number and type of circuit breakers or protective devices it will house.
• Required spacing for safe operation and maintenance.
• Compliance with electrical clearance and creepage distances to prevent short circuits or electrical hazards.
• Installation location (wall-mounted, floor-mounted, or embedded). For practical compliance, manufacturers and installers typically follow international standards such as IEC 61439 for low-voltage switchgear and controlgear assemblies, which provide guidance on enclosure dimensions, internal spacing, and accessibility.

Installation and Market Compliance

• Distribution boxes must be installed according to local electrical codes and safety standards.
• All imported or domestically produced equipment must undergo mandatory conformity approval for safety, EMC, RF, and RoHS regulations before entering the Uzbekistan market .
• Certificates issued before October 10, 2025, remain valid until their stated expiry, but new installations must comply with the updated technical regulations .

Recommendations

• Consult the Cabinet of Ministers' Technical Regulations for detailed safety requirements and installation guidelines .
• Use standard low-voltage enclosures sized according to the number of circuits and protective devices, ensuring adequate spacing for heat dissipation and maintenance.
• Ensure all labeling, documentation, and conformity marks are in accordance with Uzbek regulations to avoid compliance issues. By following these guidelines, low-voltage distribution boxes in Uzbekistan can meet both safety and regulatory requirements, even if exact dimensional specifications are determined by the specific installation and equipment configuration.