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NB/T 10294-2019 English PDF

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NB/T 10294-2019: (Computer room cable rack)
Status: Valid
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NB/T 10294-2019489 Add to Cart 4 days (Computer room cable rack) Valid

Similar standards

GB/T 20138   GB/T 4343.2   NB/T 10293   NB/T 10287   

Basic data

Standard ID: NB/T 10294-2019 (NB/T10294-2019)
Description (Translated English): (Computer room cable rack)
Sector / Industry: Energy Industry Standard (Recommended)
Classification of Chinese Standard: K65
Classification of International Standard: 29.120.10
Word Count Estimation: 21,225
Date of Issue: 2019-11-04
Date of Implementation: 2020-05-01
Issuing agency(ies): National Energy Administration

NB/T 10294-2019: (Computer room cable rack)

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Cable tray for telecom central offices ICS 29.120.10 K 65 NB Energy Industry Standards of the People's Republic of China Machine room cable rack 2019-11-04 released 2020-05-01 implementation Issued by National Energy Administration

Table of contents

Foreword...II Introduction...III 1 Scope...1 2 Normative references...1 3 Terms and definitions...1 4 Model code...2 5 Environmental requirements...3 6 Technical requirements...4 7 Test method...7 8 Inspection Rules...9 9 Marking, transportation and storage...10 Appendix A (informative appendix) Examples of typical supports and hangers...14 Appendix B (informative appendix) Typical example of cable tray...16 Appendix C (informative appendix) Recommended table for the use of cable racks in different environments...17 References...18 Figure 1 Layout of load test for straight section...12 Figure 2 Layout of partial load test for straight-line joints...12 Figure 3 Layout of test pieces for impact test...13 Figure 4 Electrical continuity test layout...13 Figure A.1 Typical example diagram of cable support and hanger...14 Figure A.2 Two-hole right-angle connector...14 Figure A.3 Single hole opening fixture...14 Figure A.4 Three-hole right-angle connector...15 Figure A.5 Hanging from the top of the harness...15 Figure A.6 Harness rod bracket...15 Figure A.7 Aluminum top fixing parts...15 Figure B.1 Typical example diagram of aluminum alloy cable tray...16 Figure B.2 Typical example diagram of channel steel cable rack...16 Figure B.3 Typical example of grid cable rack...16 Table 1 Material and code of main structure...2 Table 2 Cable rack protection type and corresponding environmental condition level...2 Table 3 Parameters of different climate and environmental levels...3 Table 4 Environmental parameters of different chemical corrosion...3 Table 5 Allowable minimum profile thickness...4 Table 6 Metal-inorganic composite coating and organic composite coating properties...4 Table 7 System life cycle classification and technical requirements...5 Table 8 Recommended size of common specifications...5 Table 9 Table of typical cable rack safe working load (SWL)...6 Table C.1 Recommended table for the use of cable racks in different environments...17

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009. This standard was proposed by China Electrical Equipment Industry Association. This standard is under the jurisdiction of the National Electrical Accessories Standardization Technical Committee (SAC/TC 67). Drafting organizations of this standard. Zhongshan Hengyiying Industrial Co., Ltd., Weikai Certification and Testing Co., Ltd., ABB (China) Co., Ltd. Hai Branch, Shenzhen Huayitong Industrial Electric Co., Ltd., Shenzhen Shenghe Communication Co., Ltd., China Electrical Equipment Research Institute Co., Ltd. Division, Guangzhou Panyu Tianhong Industrial Development Co., Ltd. The main drafters of this standard. Li Dajian, Cai Jun, Dong Gang, Luo Yangjun, Li Xiaojun, Li Xiqin, Wang Minggui, Sun Ting.

Introduction

This standard is aimed at the wiring racks used in the electrical distribution room and electronic information room with high system life cycle requirements. The current status of wire frame production and market application, and technical requirements such as corresponding typical illustrations and test methods are given. Machine room cable rack

1 Scope

This standard specifies the definition of wire and cable routing racks for electrical distribution rooms and electronic information system rooms with high system cycle life requirements. Structural requirements, test methods, inspection rules, signs, transportation and storage, etc. This standard applies to wiring racks for indoor and outdoor industrial and civil buildings, high and low voltage power transmission and distribution, and electronic information engineering.

2 Normative references

The following documents are indispensable for the application of this document. For dated reference documents, only the dated version applies to this article Pieces. For undated references, the latest version (including all amendments) applies to this document. GB/T 1720 Determination of paint film adhesion GB/T 1804-2000 General Tolerance Tolerance of linear and angular dimensions without tolerance GB/T 2423.55-2006 Environmental testing of electrical and electronic products Part 2.Environmental testing Eh. Hammer test GB/T 2518 Continuous hot-dip galvanized steel sheet and steel strip GB/T 4956 Magnetic method for measuring the thickness of non-magnetic coating on magnetic substrate GB/T 5237.1-2017 Aluminum alloy building profiles Part 1.Base material GB/T 8013.1 Aluminum and aluminum alloy anodic oxide film and organic polymer film Part 1 Anodic oxide film GB/T 9274-1988 Determination of resistance of paints and varnishes to liquid media GB/T 10125 Artificial atmosphere corrosion test salt spray test GB/T 16585 Vulcanized rubber artificial weathering (fluorescent ultraviolet lamp) test method GB/T 21762-2008 cable management cable tray system and cable ladder system

3 Terms and definitions

3.1 Cabling tray In the wiring of power distribution system or electronic information system, the straight section composed of side beams and crosspieces, connecting components and hangers have support Metal rigid structure system for supporting, binding and fixing wires and cables. 3.2 System life cycle The whole process of cable rack system design, production, operation, use, maintenance, and disposal. 3.3 Aluminum alloy cabling tray Cable rack made of aluminum alloy profile. 3.4 Boundary beam Bear the load of wires and cables and form the axial beams around the wire rack. 3.5 Barre Bear the load of wires and cables and form the horizontal beam in the middle of the cable rack. 3.6 Supports and pendants A load-bearing component that directly supports the cable rack and cable load. 3.7 System accessory System components used to complete the auxiliary functions such as the connection and direction change of the straight section of the cabling frame. Note. For example. connecting plates, fasteners, etc. 3.8 Safe working load; SWL The maximum load that can be safely applied in normal use. 3.9 Span The distance between the centers of two adjacent supports.

4 Model code

The material code of the main structure (see Table 1), and the use environmental condition level (see Table 2). The manufacturer determines by himself whether the model code is marked on the product, but the product manual should have the corresponding protection type and corresponding use environment Condition level.

5 Use environment requirements

5.1 Environmental requirements for normal use 5.1.1 The altitude of the installation site shall not exceed 2 000 m. 5.1.2 See Table 3 for the parameters of different climate and environmental levels. 5.2 Special use environment requirements 5.2.1 See Table 4 for laying in different chemically corrosive environments. 5.2.2 Laying at an altitude of more than 2 000 m. Note. Laying at altitudes above 2 000 m is determined by the user and the manufacturer through consultation.

6 Technical requirements

6.1 Material classification and requirements 6.1.1 The materials used for the side beams and crosspieces of the steel cabling frame shall comply with the relevant regulations of the continuous hot-dip galvanized steel sheet GB/T 2518. 6.1.2 All profiles of side beams and crosspieces of aluminum alloy cable rack shall conform to the grades in Table 12 of aluminum alloy extruded profiles GB/T 5237.1-2017 It is 6063, and the supply status is T5 aluminum alloy material performance regulations. 6.1.3 All kinds of structural supports and hangers and system accessories should be made of steel materials and should comply with the relevant regulations of their own standards. 6.2 Structural requirements 6.2.1 Refer to Appendix A for the typical cross-sectional structure of aluminum alloy edge beams. 6.2.2 Refer to Appendix A for the typical cross-section structure of aluminum alloy crosspieces. 6.2.3 Refer to Appendix A for the typical cross-sectional structure of steel edge beams. 6.2.4 Refer to Appendix A for the typical section structure of steel crosspieces. 6.3 Material thickness See Table 5 for the thickness of steel and aluminum alloy profiles. 6.4 System cycle life 6.4.1 The coating performance of the wiring structure components and system accessories shall meet the requirements of Table 6. 6.4.2 The system life cycle classification and technical requirements of the main components of the cabling frame shall meet the requirements of Table 7. 6.4.3 The anti-corrosion technical requirements of the cable support hanger and all system accessories shall not be lower than the requirements of the lowest level of the system life cycle in Table 7. begging. 6.4.4 The anti-corrosion technical requirements of the standard fasteners of the cabling frame shall be specified in Table 6, and shall not be lower than the lowest level of the system life cycle in Table 7. Specify requirements. 6.5 Common Specifications of Cable Rack Refer to Table 8 for recommended dimensions for the width of the cable tray. See Appendix B for typical illustrations. 6.6 Length The recommended length of the cable rack linear unit is 2 m, 3 m, 4 m, and 6 m. 6.7 Crosspieces of the cable rack The center distance of the rungs of the cable rack should not be greater than 300 mm. 6.8 Manufacturing accuracy The allowable deviation of the length of the straight section of the cable rack shall meet the following requirements. a) When the length is ≤2 000 mm, the allowable deviation is ±2.0 mm; b) When the length is more than 2 000 mm, the allowable deviation is ±4.0 mm. The limit deviation of the remaining dimensions shall comply with the requirements of Grade V in GB/T 1804-2000. 6.9 Quality requirements for welded parts The surface of the welding seam is uniform, and there shall be no defects such as missing welding, cracking, slag inclusion, burning through, arc crater, etc. 6.10 Protection circuit continuity Under normal environment conditions, the cable rack system should have reliable electrical connections and be grounded. The technical requirements for the continuity of the protection circuit are. The connection resistance at the jumper point should be less than or equal to 50 mΩ. 6.11 Mechanical strength 6.11.1 Normal mechanical load The cable tray should provide sufficient mechanical strength, in addition to its own weight, it should also include the mechanical load of the wire and cable that it can bear. Lotus. The safety of product use is the main basis for judging the safe working load (SWL). a) The required mechanical strength can be obtained by selecting the thickness and shape of the material, or by the distance of the fixed bracket specified by the manufacturer Got. b) When the wire rack bears the safe working load (SWL), the relative deflection of steel should not be greater than 1/200, and aluminum alloy should not be large. At 1/300.(See Table 9). Note. The manufacturer or its agent can give the safe working load (SWL) in the form of load curve, table or similar Note. The safe working load of the span of other supports and hangers shall be given by the manufacturer in the technical documents or negotiated by the supplier and the buyer. c) Various types of supports and hangers should be able to withstand the safe working load (SWL) of the corresponding specifications (number of layers), and meet the requirements of strength, rigidity and stability Sexual requirements. See Appendix A for typical legends. d) For such products with normal mechanical load, there should be warning signs, such as. warning-do not use as a pedestrian passage, only as a cable, Use of mechanical supports for electrical pipelines. 6.11.2 Special mechanical loads In addition to the normal mechanical load, the cable rack system cannot be used as a pedestrian passage in principle. If it needs to be used as a pedestrian passage for other purposes, Special designs for this purpose should be negotiated between the manufacturer and the user. 6.11.3 Impact resistance The cable rack should be able to withstand the impact of the collision energy of 10 J in Table 2 of GB/T 2423.55-2006, and it should not affect the safe use after the collision. Deformation and cracks.

7 Test method

7.1 Salt spray test According to the provisions of GB/T 10125. 7.2 UV condensation test According to the provisions of GB/T 16585. 7.3 Alkali resistance test According to GB/T 9274-1988 middle A method (immersion method). 7.4 Acid resistance test According to GB/T 9274-1988 Middle A method (immersion method) 7.5 Coating thickness measurement According to the provisions of GB/T 4956. 7.6 Coating adhesion measurement According to the provisions of GB/T 1720. 7.7 Thickness of anodized film According to the provisions of GB/T 8013.1. 7.8 Appearance and dimensional accuracy The appearance is visually inspected, and the dimensional accuracy is checked with a universal measuring tool. 7.9 Mechanical load test 7.9.1 General requirements for mechanical load test The mechanical load test of the cabling frame can be based on the partial load of the straight section joint. When the test passes, the straight section machine without joints The mechanical load test can be omitted. 7.9.2 Mechanical load test of straight section and straight section joints 7.9.2.1 Reliability verification Use the safe working load (SWL) given in Table 9 to verify the reliability of the structural strength of the cable tray when installed horizontally. 7.9.2.2 Sample requirements The sample is a straight section, no less than two pieces and necessary connecting pieces. The distance between supports and hangers and the value of safe working load are in accordance with Table 11.wort it The load tests of the joints of the straight section and the straight section are arranged according to Figure 1 and Figure 2 respectively. 7.9.2.3 Test load requirements The test load requirements are as follows. a) Weights, steel bars, loaders or other discontinuous rigid materials can be used. The steel bar can be 3 mm thick, 30 mm～50 mm wide, and long Flat steel with a degree of not more than 500 mm, other load material width not more than 125 mm, length not more than 300 mm, maximum weight Not more than 5 kg. b) All loads should be evenly distributed on the test sample. Even when the test sample is extremely deformed, the load should be evenly distributed. Uniform distribution (ie UDL). c) The load test is carried out at ambient temperature. If the user’s requirements or the relative mechanical properties of the material used The maximum and minimum characteristics of ±5% of the average value of the maximum and minimum characteristics caused by changes within a certain temperature range shall be adjusted according to GB/T 21762-2008 Conduct low temperature and high temperature tests. 7.9.2.4 Load The loading requirements are as follows. a) The loading is divided into two ways. normal loading and ultimate loading. The normal loading is based on the safe working load (SWL) given in Table 11. When the distance between supports and hangers is greater than 2 m, the safe working load value provided by the manufacturer’s product specifications; The load is 1.5 times of the safe working load (SWL) given in Table 11.If there is no special user requirement, select the normal load mode. for In order to facilitate the loading of the ladder frame, it is allowed to use a steel plate or net plate with a thickness of 1 mm and a length of not more than 1 m to be placed on the cross block in the span of the support. Two steel plates cannot be overlapped, and the weight of the steel plate should be included in the total weight of the test load. The distance between the load and the side of the specimen is 10 mm～ 15 mm. b) The load is applied to each test sample through the load block, and it is continuously increased to the safe working load in both the transverse and longitudinal directions (SWL), each increment cannot exceed a quarter of the safe working load (SWL). 7.9.2.5 Test results 7.9.2.5.1 After the test load is added to the rated value, adjust the support and hanger and the test piece smoothly, and measure them at the center of the two sides in the middle of the span The average deflection value of the value should meet the requirements of Table 11, and the accuracy level is 0.1 mm. 7.9.2.5.2 After the test is completed, the test load is removed, and there should be no obvious permanent deformation of the cable rack. 7.9.2.5.3 During and after the test (after unloading), the protective circuit of the joint should maintain its function. 7.10 Impact test 7.10.1 Test product requirements The test is carried out on the test sample of the cable rack with a length of (250±5) mm and a quantity of three. 7.10.2 Test sample layout See Figure 3. 7.10.3 Test conditions The wire rack can be tested at room temperature. 7.10.4 Test method The three samples were subjected to impact tests on the bottom and two sides respectively, and the impact positions were the bottom and the middle of both sides respectively. The installation requirements of the test product should meet the requirements of GB/T 2423.55-2006. The severity level is assessed in accordance with the provisions of GB/T 2423.55-2006 and the impact energy value of 10 J. The number of impacts is one for each. 7.10.5 Test results After the impact test, the sample should not show any deformation, cracks, or even breaks that affect safe use. 7.11 Protection circuit continuity test 7.11.1 Test product requirements The test product should include two straight sections and matching connecting plates and connecting bolts. When the protective layer is a non-conductive coating, it should also include A set of jumper wires. 7.11.2 Test preparation Use a suitable degreasing agent to clean the tested sample without oil stains. And install the accessories. 7.11.3 Test method and judgment Under normal use environmental conditions, pass (25±0.1) A alternating current on the sample, and the frequency of the current is 50 Hz～60 Hz. Provided by a power supply whose no-load voltage does not exceed 12 V.

8 Inspection rules

8.1 Inspection classification The inspection of the cable rack is divided into two types. type inspection and factory inspection. 8.2 Type inspection 8.2.1 The purpose of the type inspection is to verify whether the performance of the cable rack meets the requirements of this standard. In one of the following situations, the type should be carried out test. a) When a new product is tested for type identification or an old product is transferred to a factory; b) After the product is put into production, if there are major changes in structure, materials, and processes, which may affect the performance of the product; c) When the product has been discontinued for more than one year and production is resumed; d) When the national quality supervision agency requests for type inspection. 8.2.2 The test of the protective layer shall be conducted in parallel with samples of the same batch of materials and processes. The remaining tests can be in any order On the same product. 8.2.3 Type inspection items include. a) Inspection of appearance ......
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