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GB/T 45655-2025General modular electrical cabinets with narrow-sized dimensions (English PDF)

通用窄尺寸模数化电气机柜

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Issued by

SAMR; SAC

Level / Type

National · Recommended

Issue date

April 25, 2025

Implementation date

November 1, 2025

Scope

GB/T 45655-2025 is the English-translated version of 通用窄尺寸模数化电气机柜.

GB/T 45655-2025 is the Chinese standard "General modular electrical cabinets with narrow-sized dimensions". Its scope clause reads: This document specifies the dimensions, verification samples, and test conditions of modular electrical cabinets (hereinafter referred to as cabinets) with a width of 375mm~500mm.

Conditions and sequence, requirements, tests and qualification determination, and inspection rules. This document applies to the production, manufacturing and acceptance of cabinets.

Note. The technical requirements indicated in this document do not cover all cabinet requirements. Manufacturers and users should note that there may be some extension requirements when applying cabinet products.

If the design may affect the safety performance of the product, if there is a risk, the manufacturer and the user should have an appropriate agreement and agree on the risk-bearing responsibility.

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Document preview — GB/T 45655-2025

National Standard of the People's Republic of China

ICS: 31.240
Classification: K 05

Issued by: State Administration for Market Regulation; Standardization Administration of the PRC

Preface
1 Scope
2 Normative references
3 Terms and Definitions
4 Size
4.1 Metric module
4.2 Imperial Mechanical Structure
4.3 Compatible cabinets
4.4 Coordination Dimensions
5 Verification samples, test conditions and sequence
5.1 Verify sample manufacturing materials
5.2 Verification sample composition
5.3 Verification samples and their tests
5.4 Verification sample configuration and simulated load
5.5 Test conditions
5.6 Test sequence
5.7 Verification level identification
6 Requirements
6.1 Surface
6.2 Continuity of protection circuit
6.3 Protective grounding terminal
6.4 Low temperature, high temperature and damp heat (cycle) resistance
6.5 Resistance to industrial atmosphere
6.6 Rated load resistance test performance
6.7 Vertical structure test performance
6.8 Stiffness resistance test performance
6.9 Vibration and shock test performance
6.10 Protection level
6.11 Anti-collision performance
6.12 Earthquake resistance
6.13 Flammability
7 Test and qualification determination
7.1 Surface inspection
7.2 Continuity test of protection circuit
7.3 Inspection of protective grounding terminal
7.4 Low temperature, high temperature and damp heat (cycle) test
7.5 Industrial atmosphere test
7.6 Rated load test
7.7 Vertical structure test
7.8 Stiffness test
7.9 Vibration and shock test
7.10 Protection level verification
7.11 Collision Test
7.12 Earthquake Test
7.13 Flammability test
8 Inspection Rules
8.1 Inspection categories
8.2 Inspection Items
Appendix A (Normative) Cabinet seismic test method
References

1 Scope

This document specifies the dimensions, verification samples, and test conditions of modular electrical cabinets (hereinafter referred to as cabinets) with a width of 375mm~500mm.

Conditions and sequence, requirements, tests and qualification determination, and inspection rules.

This document applies to the production, manufacturing and acceptance of cabinets.

If the design may affect the safety performance of the product, if there is a risk, the manufacturer and the user should have an appropriate agreement and agree on the risk-bearing responsibility.

2 Normative references

The contents of the following documents constitute essential clauses of this document through normative references in this document.

For referenced documents without a date, only the version corresponding to that date applies to this document; for referenced documents without a date, the latest version (including all amendments) applies to

This document.

GB/T 2423.1 Environmental testing for electric and electronic products Part 2.Test methods Test A. Low temperature

GB/T 2423.2 Environmental testing for electric and electronic products Part 2.Test methods Test B. High temperature

GB/T 2423.4 Environmental testing for electric and electronic products Part 2.Test method Test Db. Cyclic damp heat (12h 12h cycle ring)

GB/T 2423.5 Environmental testing Part 2.Test method Test Ea and guidance. Impact

GB/T 2423.10 Environmental testing Part 2.Test methods Test Fc. Vibration (sinusoidal)

GB/T 2423.17 Environmental testing Part 2.Test methods Test Ka. Salt spray

GB/T 2423.18 Environmental testing Part 2.Test methods Test Kb. Salt spray, alternating (sodium chloride solution)

GB/T 2423.19 Environmental testing Part 2.Test methods Test Kc. Sulfur dioxide test for contact points and connectors

GB/T 2423.20 Environmental testing Part 2.Test methods Test Kd. Hydrogen sulfide test for contact points and connectors

GB/T 2423.43 Environmental testing for electric and electronic products Part 2.Test methods for vibration, shock and similar dynamic test specimens

Installation

GB/T 2423.48 Environmental testing Part 2.Test methods Test Ff. Vibration time history and sine beat frequency method

GB/T 2424.11 Environmental testing Part 2.Test methods Test Kc. Guidelines for sulfur dioxide tests on contact points and connectors

GB/T 2424.25 Environmental testing Part 3.Test guidelines Seismic test method

GB/T 3047.1 Basic dimension series of panels, racks and cabinets with a height of 20 mm

GB/T 4208 Enclosure protection grade (IP code)

GB/T 4798.3-2023 Classification of environmental conditions Classification of environmental parameter groups and their severity classification Part 3.Weather protection

Fixed use in protective places

GB/T 5169.16-2017 Fire hazard tests for electrical and electronic products Part 16.Test flame 50W horizontal and vertical fire

Flame test method

GB/T 8582 Terminology of mechanical structures of electrical and electronic equipment

GB/T 17214.4 Operating conditions for industrial process measurement and control equipment Part 4.Effects of corrosion and erosion

GB/T 19290.1 Modular series of mechanical structures of developing electronic equipment Part 1.General specification

GB/T 30137 | GB/T 44652 | NB/T 10613 | GB/T 40815.6 | GB/T 18663.6 | […]

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 22 pages — is available in the English PDF.

Referenced standards

Normative references

Editions of GB/T 45655

Edition	Title	Revision	Status
GB/T 45655-2025	General modular electrical cabinets with narrow-sized dimensions	current edition	Current

This page sells the current edition, GB/T 45655-2025. Earlier editions are listed for reference only.

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