1 Scope
This part of GB/T 20041 specifies technical requirements for conduit systems for cable management (including conduits and conduit fittings), e.g. classification, marking and documentation, dimensions, construction, mechanical properties, electrical properties and thermal properties.
This part applies to metallic, non-metallic and composite conduit systems, including threaded and non-threaded entries which terminate the system, For the protection and management of insulated conductors and/or cables in electrical installations or in communication systems up to 1 000 V a.c. and/or 1 500 V d.c.
This part does not apply to enclosures and connecting boxes which come within the scope of GB 17466.
Note 1: Certain conduit systems may also be suitable for use in hazardous atmospheres. Regard should then be taken of the extra requirements necessary for equipment to be installed in such conditions.
Note 2: Earthing conductors may or may not be insulated.
2 Normative References
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB 4208 Degrees of Protection Provided by Enclosure (IP Code) (GB4208-2008, IEC60529:2001, IDT)
GB/T 5169.11-2006 Fire Hazard Testing for Electric and Electronic Products – Part 11: Glowing/Hot-wire Based Test Methods – Glow-wire Flammability Test Method for End-products (IEC60695-2-11:2000, IDT)
GB/T 5169.14-2007 Fire Hazard Testing for Electric and Electronic Products – Part 14: Test Flames – 1 kW Nominal Pre-mixed Flame – Apparatus Confirmatory Test Arrangement and Guidance (IEC60695-11-2:2003, IDT)
GB/T 5465.2-2008 Graphical Symbols for Use on Electrical Equipment – Part 2: Graphical Symbols (IEC 60417 DB.2007, IDT)
GB/T 17194 Conduits for Electrical Purposes – Outside Diameters of Conduits for Electrical Installations and Threads of Conduits and Fittings (GB/T 17194-1997,eqv IEC 60423:1993)
3 Terms and Definitions
For the purpose of this document, the following terms and definitions apply.
Foreword i
1 Scope
2 Normative References
3 Terms and Definitions
4 General Requirements
5 General Conditions for Tests
6 Classification
7 Marking and Documentation
8 Dimensions
9 Construction
10 Mechanical Properties
11 Electrical Properties
12 Thermal Properties
13 Fire Hazard
14 External Influences
15 Electromagnetic Compatibility
Annex A (Normative) Classification Coding for Conduit Systems
Annex B (Normative) Determination of Material Thickness
Bibliography
