This standard is applicable to bus ducts with rated working voltage AC up to 1000V (1140V), frequency 50Hz or 60Hz, and rated current up to 5000A. The special requirements for various types of bus duct products should be supplemented and specified in the corresponding product standards. This standard specifies the fire-resistant busbar main system (fire-resistant busbar duct) The definition, model, classification, technical requirements, test methods, inspection rules and markings, packaging, transportation, etc. of busbar trunking (hereinafter referred to as busbar trunking) are normative references. The clauses in the following documents become clauses of this standard through reference in this standard. For dated reference documents, all subsequent modification orders (excluding corrected content) or revised versions do not apply to this standard. However, it is encouraged to reach agreements based on this standard The parties involved in the discussion are studying whether the latest versions of these documents can be used. For undated references, the latest version applies to this standard. GB/T 2423.4-1993 Basic Environmental Testing Procedures for Electrical and Electronic Products, Test Db: Alternating Humidity Heat Test Method (eqv IEC60068-2-30:1980) GB 4208-1993 Housing Protection Level (P-code) (eqv IEC 60529:1989) GBT 5169.10-1997 Fire Hazard Testing for Electrical and Electronic Products - Glow Wire Test Method - General (idt IEC60695-2-1/0:1994) GB/T5169.11-1997 Fire Hazard Testing for Electrical and Electronic Products, Glow Wire Testing for Finished Products, and Guidelines (idt IEC60695-2-1/0:1994) GB 5585.2-1985 Copper for Electrical Purposes Aluminum and its alloy busbar Part 2: Copper busbar (neq IEC 60105:1958) GB 7251.1-1997 Low voltage switchgear and control equipment Part 1: Type tests and partial type tests Complete equipment (idt lEC 60439-1:1992) GB 7251.2-1997 Low voltage switchgear and control equipment Part 2: Special requirements for busbar trunking systems (busbar ducts) (idt IEC 60439-2:1987> GB/T 9978-1999 Fire resistance test methods for building components (neq ISO/FDIS 834-1:1997 (E)) JB/T 3085-1999 Product Packaging and Transportation Regulations for Electric Power Transmission Control Devices JB/T 3752.1-1999 Method for Compiling Product Models of Low Voltage Switchgear and Control Equipment: Part 1: Low Voltage Switchgear
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