CECS : 8997 Construction and acceptance specifications for integrated wiring systems for buildings and building complexes CECS89:97
Some standard content:
Standard of China Association for Engineering Construction Standardization
89:97
Code for construction and acceptance of generic cabling system for buildings and campus April 1997
Standard of China Association for Engineering Construction Standardization
Code for construction and acceptance of generic cabling system for buildings and campus
89:97
Editor: Communications Engineering Committee of China Association for Engineering Construction Standardization Approving unit: China Association for Engineering Construction Standardization Approval date: April 15, 1997
"Code for construction and acceptance of generic cabling system for buildings and campus" was jointly compiled by the Communications Engineering Committee of China Association for Engineering Construction Standardization, Beijing Design Institute of Ministry of Posts and Telecommunications, China Communications Construction Corporation and Beijing Telecommunications Administration. This specification is mainly based on summarizing engineering practice experience, referring to relevant domestic and foreign standards and specifications, and carefully soliciting opinions from relevant units and experts such as the Ministry of Posts and Telecommunications and the Ministry of Construction. Finally, it was reviewed and finalized by the Communication Engineering Committee of the China Engineering Construction Standardization Association.
The "Construction and Acceptance Specifications for Integrated Cabling System Engineering of Buildings and Building Complexes" CECS89:97 is now approved as the standard of the China Engineering Construction Standardization Association for use by relevant units such as engineering construction, design, and construction. During use. If you find that there is a need for modification or supplement, please send your opinions and relevant information to the Communication Engineering Committee of the China Engineering Construction Standardization Association (No. 11, Anhuili 2nd District, Chaoyang District, Beijing, Beijing Design Institute of the Ministry of Posts and Telecommunications, Postal Code 100101) for future revisions. The Communication Engineering Committee of the China Engineering Construction Standardization Association is responsible for the management and interpretation of this specification. The main editor of this specification: China Association for Engineering Construction Standardization Telecommunications Engineering Committee Participating editors: Beijing Design Institute of Ministry of Posts and Telecommunications
China Communications Construction Corporation
Beijing Telecommunications Administration
List of main drafters: Zhang Yi, Ruan Peiyi, Chen Yaoming China Association for Engineering Construction Standardization
April 1997
Environmental inspection before construction
Equipment inspection before construction
Equipment installation
Cable laying and support protection methods····Cable termination·
Engineering electrical testing…
Project Acceptance·
Appendix A
Appendix B
Appendix C
Appendix D
Appendix E
Appendix F
Explanation of terms used in this specificationbzxz.net
Items and contents of acceptance of integrated wiring system engineeringElectrical test methods and contents of integrated wiring system engineeringPolarity of optical fiber connectors
Representation of twisted pair cable models
Supporting units for the preparation of this specification
1General
1.0.1This specification is the technical basis for the construction and acceptance of integrated wiring system engineering for buildings and building complexes, and can be used as a reference for new construction, expansion and reconstruction projects. 1.0.2For any content not included in this specification, it should be handled according to the engineering design during the construction and acceptance of the integrated wiring system engineering.
1.0.3During construction, any technical standards, specifications and technical requirements not included in this specification can be implemented in accordance with the requirements of the "Design Specifications for Integrated Wiring System Engineering for Buildings and Building Complexes". 1.0.4 During the construction process, the construction unit must implement the provisions of this specification on construction quality inspection. The construction unit's on-site representative or engineering supervision personnel should strengthen the technical supervision of the construction site and the engineering quality inspection work. 1.0.5 The content and methods of the project acceptance should be handled in accordance with this specification. 1.0.6 In addition to complying with this specification, the construction and acceptance of the integrated wiring system project should also comply with the current national "Technical Specifications for Construction and Acceptance of Urban Telephone Line Projects", "Interim Technical Regulations for Construction and Acceptance of Telecommunications Network Optical Fiber Digital Transmission System Projects", "Technical Specifications for Construction and Acceptance of Urban Communication All-Plastic Cable Line Projects" and other relevant regulations. 2 Environmental inspection before construction
2.0.1 Before the installation project begins, the building and environmental conditions of the handover room and equipment room should be inspected, and the construction can only start when the following conditions are met: 1 The civil engineering of the handover room, equipment room, and work area has been completed. The floor of the house is flat and smooth, the height and width of the door should not hinder the transportation of equipment and instruments, and the door locks and keys are complete.
2 The location, quantity and size of the reserved troughs, concealed pipes and holes in the house shall meet the design requirements.
3 The laying of the movable floor in the equipment room shall be specially checked. The floor panels shall be laid tightly and firmly, and the horizontal deviation per square meter shall not be greater than 2mm. The floor pillars shall be firm, and the grounding of the anti-static measures of the movable floor shall meet the design and product specifications. 4. Reliable construction power supply and grounding devices shall be provided in the handover room and equipment room. 5 The area, ambient temperature and humidity of the handover room and equipment room shall meet the design requirements and relevant regulations.
3 Equipment inspection before construction
3.0.1 General requirements for equipment inspection:
1 Before construction, the construction unit shall inspect the specifications, procedures, quantity and quality of the cable equipment used in the project. Equipment without factory inspection certification materials or inconsistent with the design shall not be used in the project.
2 Records shall be kept for the inspected equipment, and unqualified devices shall be stored separately for inspection and processing.
3.0.2 Inspection requirements for profiles, pipes and iron parts: 1 The materials, specifications and models of various profiles shall comply with the provisions of the design documents, and the surface shall be smooth, flat and free of deformation and breakage. 2 When steel pipes, rigid polyvinyl chloride pipes and glass fiber reinforced plastic pipes are used as pipes, the pipe body shall be smooth and free of scratches, and the pipe holes shall not be deformed. The aperture and wall thickness shall meet the design requirements. 3 When cement pipe blocks are used for pipelines, they shall comply with the relevant provisions of the "Technical Specifications for Construction and Acceptance of Communication Pipeline Projects" (YDJ39-90) of the Ministry of Posts and Telecommunications. 4 The materials and specifications of various iron parts shall meet the quality standards and shall not be skewed, twisted, punctured, broken or damaged.
5 The surface treatment and coating of iron parts shall be uniform and complete, with a smooth surface and no defects such as shedding and bubbles.
3.0.3 Inspection requirements for cables:
1 The specifications, procedures and forms of the twisted pair cables and optical cables used in the project shall comply with the design provisions and contract requirements.
2 The marks and labels attached to the cable should be complete and clear. 3 The outer sheath of the cable must be intact, and the cable should be accompanied by a factory quality inspection certificate. If the user requires, the electrical performance inspection report of this batch of cables should be attached. 4 The electrical performance of the cable should be sampled and tested by cutting 100m length from any three reels of this batch of cables.
5 Strip the cable head, identify the end if A and B ends are required, and mark the category and serial number on the outer end of the cable.
6 After the optical cable is opened, check whether the surface of the optical cable is damaged and whether the encapsulation of the optical cable end is good.
7 When the integrated wiring system project uses 62.5/125um or 50/125um multi-mode gradient refractive index optical fiber cable and single-mode optical fiber cable, the on-site inspection should test the optical fiber attenuation constant and optical fiber length.
1) Attenuation test: It is advisable to use optical time domain reflectometer 8OTDR> for testing. If the test result exceeds the standard or differs greatly from the factory test value, an optical power meter should be used for testing. And compare to determine whether it is a test error or the fiber itself is too attenuated. 2) Length test: Each fiber is required to be tested, and the test results should be consistent. If the fiber lengths vary greatly in the same optical cable, the test should be conducted from the other end or a light check should be performed to determine whether there is a fiber break. 8 The inspection of optical fiber dispatching soft fiber (optical jumper) should comply with the following regulations: 1) The optical fiber dispatching soft cable should have a fireproof optical fiber protective sheath, and the end faces of the active connectors (live joints) at both ends should be equipped with appropriate protective caps: 2) The type of optical fiber in each optical fiber dispatching soft fiber should be clearly marked, and the selection should meet the design requirements.
3.0.4 Inspection requirements for connectors:
The plastic material of the wiring block, information socket and other connectors should be flame retardant. 1
2 The various indicators of the overvoltage and overcurrent protection of the security unit of the security wiring block should comply with the relevant regulations of the Ministry of Posts and Telecommunications.
The type, quantity and position of the fiber optic socket connectors shall be consistent with the design. 4
The fiber optic socket panel shall have obvious signs for transmission (TX) and reception (RX). 3.0.5
The use of wiring equipment shall comply with the following provisions: The type and specifications of the cable handover equipment shall comply with the design requirements. 2 The arrangement and name of the optical and cable handover equipment shall be consistent with the design. The names of various signs shall be unified. The position of the signs shall be correct and clear. 3.0.6 The specific technical indicators and requirements for the electrical performance, mechanical characteristics, optical cable transmission performance and connectors of the twisted pair cable shall comply with the contents of Appendix B of the design specification. 4
4.01 Rack installation requirements:
4 Equipment installation
1 After the rack is installed, the horizontal and vertical degrees should comply with the manufacturer's regulations. If there is no manufacturer's regulations, the vertical deviation should not be greater than 3mm. 2 Various parts on the rack must not fall off or be damaged. If the paint surface falls off, it should be repainted, and various signs should be complete and clear.
3 The rack should be installed firmly and reinforced according to the earthquake-proof requirements of the construction drawing. 4 When installing the rack panel, a 1.5m space should be left in front of the rack, and the distance between the back of the rack and the wall should be greater than 0.8m to facilitate installation and construction. 5
The bottom of the wall-mounted frame should be 300~800mm from the ground. Wiring equipment rack installation requirements:
When the lower wiring method is adopted, the bottom position of the rack should correspond to the cable upper wire hole. 2 The vertical tilt error of each inline column should not be greater than 3mm, and the horizontal error of the base should not be greater than 2mm per square meter.
3 Various signs of the terminal block should be complete.
4 The junction box or dark wire box should be concealed in the wall. A wall hole should be reserved for installation, and the bottom of the box should be 500-1000mm above the ground.
Requirements for installation of various wiring modules:
The module equipment should be complete, installed in place, and fully marked. 2The mounting screws must be tightened, and the panel should be kept on a horizontal plane. 4.0.4Installation requirements for information sockets:
1If installed on a raised floor or the ground, it should be fixed in the junction box. The socket panel has vertical and horizontal forms; the junction box cover can be opened and should be strictly waterproof and dustproof. The junction box cover should be flush with the ground.
2If installed on the wall, it should be 300mm above the ground. If the ground uses a raised floor, the net height size of the raised floor should be added. 3The fixing method of the information socket base depends on the conditions of the construction site, and it is advisable to use expansion screws, nails, etc.
4The fixing screws must be tightened and should not be loose. 5 Information sockets should be labeled to indicate the type of terminal equipment connected by color, graphics, and text.
The installation location should meet the design requirements.
Cable tray and trough installation requirements:
The installation location of the cable tray and trough should meet the requirements of the construction drawings, and the left and right deviations should not exceed 50mm.
2 The horizontal deviation of the cable tray and trough should not exceed 2mm per meter. 3 Vertical cable trays and troughs should remain vertical to the ground without tilting, and the vertical deviation should not exceed 3mm.
The horizontal deviation at the joint of two troughs should not exceed 2mm. 5
The installation of the hanger should be vertical, neat and firm without skew. 6 The metal cable tray and trough sections should have good contact and be firmly installed. 4.0.6 The installation of racks, wiring equipment, metal steel pipes, and trough grounding bodies should meet the design requirements and maintain good electrical connections. 6
5 Cable laying and support protection methods
5.1 Cable laying
Cable laying should generally meet the following requirements: Before laying cables, the specifications, procedures, routes and locations should be checked against the design specifications.
2 Cables should be laid straight without twisting or looping, and should not be squeezed or damaged by external forces.
3 Cables should be labeled at both ends before laying to indicate the starting and terminal positions. The labels should be written clearly, neatly and correctly. 4 Power lines, signal cables, twisted cables, optical cables and cables of other weak current systems in buildings should be laid separately. The minimum clearance between cables should meet the design requirements. 5 There should be some redundancy when laying cables. The reserved length of twisted cables in the handover room and equipment room is generally 3 to 6 meters, and 0.3 to 0.6 meters in the working area; the reserved length of optical cables at the equipment end is generally 5 to 10 meters. If there are special requirements, the length should be reserved according to the design requirements. 6 The bending radius of the cable should comply with the following regulations: 1) The bending radius of the unshielded 4-pair twisted cable should be at least 4 times the outer diameter of the cable, and at least 8 times during construction. 2) The bending radius of the shielded twisted cable should be at least 6 to 10 times the outer diameter of the cable.
3) The bending radius of the main twisted pair cable should be at least 10 times the outer diameter of the cable. 4) The bending radius of the optical cable should be at least 15 times the outer diameter of the optical cable, and at least 20 times during construction.
7 During cable laying, the spacing between the fulcrums of the hanging cable should not be greater than 1.5m during the traction process.
8 The traction force for laying the cable should be less than 80% of the allowable tension of the cable, and the maximum pulling force on the optical cable should not exceed the allowable tension of the optical cable. When laying optical cables in a pulling manner
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