2. TIA/EIA 568A telecommunication wiring standard for commercial buildings formulated by American National Standards Institute.
3. European standard EN 50 173
4, China standard:
GB503 1 1-2007 Code for Engineering Design of Integrated Wiring System
GB503 12-2007 Code for Engineering Acceptance of Integrated Wiring System
The following is part of the Code for Acceptance of Integrated Wiring System Engineering, which is limited to words and cannot be written completely:
People's Republic of China (PRC) national standard
GB 503 12-2007
GB 503 12-2007 Code for Acceptance of Integrated Wiring Engineering (including provisions)
Code for acceptance of building and campus integrated wiring system engineering
Editor-in-Chief: People's Republic of China (PRC) and Ministry of Information Industry.
Approved by: Ministry of Construction of People's Republic of China (PRC).
Implementation date: June 65438 +2007 10.
Announcement No.620th of People's Republic of China (PRC) Ministry of Construction
Announcement of the Ministry of Construction on Issuing the National Standard "Code for Acceptance of Integrated Wiring System Engineering"
The Code for Engineering Acceptance of Integrated Wiring Systems is now approved as the national standard with the number of GB 503 12-2007, which will be implemented on June 1 2007.
Among them, Article 5.2.5 is mandatory and must be strictly implemented. Code for engineering acceptance of integrated wiring system of original buildings and buildings GB/T
503 12-2000 shall be repealed at the same time.
This specification is published by China Planning Press, organized by the Institute of Standards and Quotas of the Ministry of Construction.
People's Republic of China (PRC) Ministry of Construction
April 6(th), 2007
order
According to the requirements of Document No.67 [2004] of the Ministry of Construction "Notice on Printing and Distributing the Revision Plan of National Standards for Engineering Construction in 2004", this specification revised the original "Code for Acceptance of Building and Building Integrated Wiring System Engineering" CB/T503 12-2000 National Standards for Engineering Construction, edited by the Ministry of Information Industry and assisted by China Mobile Communications Group Design Institute Co., Ltd.
During the revision of this specification, the compilation team conducted extensive market research, carried out a number of special studies, carefully summarized the experience and lessons in the implementation of the specification, supplemented and improved it, and widely absorbed the opinions of relevant domestic units and experts. At the same time, it refers to the contents of relevant standards at home and abroad.
The terms marked in bold in this specification are mandatory and must be strictly implemented.
The Ministry of Construction is responsible for the management and interpretation of mandatory provisions, the Ministry of Information Industry is responsible for daily management, and China Mobile Communications Group Design Institute Co., Ltd. is responsible for the interpretation of specific technical contents. If there are suggestions for revision and supplement in the application process, please send the relevant materials to China Mobile Communications Group Design Institute Co., Ltd. (address:No. Dan Ling Street 16, Haidian District, Beijing, zip code: 100080) for reference in revision.
Editor-in-chief, participating units and main drafters of this specification:
Editor: China Mobile Communications Group Design Institute Co., Ltd.
Participating unit: China Institute of Building Standard Design and Research.
China Architecture Design and Research Institute
China Northeast Architecture Design and Research Institute
Modern Group East China Architecture Design Research Co., Ltd.
Wuzhou engineering design & research institute
Main drafters: Zhang Chenqi, Zhu Litong, Li Zhang Wencai, Wenboyin, Zhao Ji 'an, Qu Erlan and Chen Hanmin.
order
1 general rules
2 environmental inspection
3 inspection equipment and test instruments and tools
4 Equipment installation inspection
5 Cable laying and protection mode inspection
5? 1 cable laying
5? 2 protective measures
6 cable terminal
7 engineering electrical test
8 management system acceptance
9 project acceptance
Appendix A Project Inspection Items and Contents of Integrated Wiring System
Appendix B Engineering Electrical Test Methods and Test Contents of Integrated Wiring System
Appendix c optical fiber link test method
Appendix D Acceptance Contents of Integrated Wiring Engineering Management System
Appendix E Meaning of Test Items and Technical Indicators
Description of words in this specification
Attachment: Description of Terms and Conditions
1 general rules
1.0. 1 is specially designed to unify the technical requirements of construction quality inspection, entrance inspection and completion acceptance of buildings and building integrated wiring systems.
Finalize this specification.
1.0.2 This specification is applicable to the acceptance of new construction, expansion and reconstruction of buildings and building integrated wiring system projects.
1.0.3 The requirements of engineering technical documents and contract documents adopted in the implementation of the integrated wiring system project for the project quality acceptance shall not be lower than this specification.
Rules.
1? 0.4 In the process of construction, the construction unit must implement the provisions of this specification on construction quality inspection. The construction unit shall, through on-site representatives or projects.
Supervisors should strengthen on-site quality inspection and organize the inspection and acceptance of concealed works in time.
1.0.5 The integrated wiring system project shall meet the design requirements, and the self-inspection test and completion acceptance test shall be conducted before the project acceptance.
1.0.6 The acceptance of the integrated wiring system project shall conform to the current national technical standards and specifications in addition to this specification.
2 environmental inspection
2.0. 1 The inspection of work area, telecommunication room and equipment room shall include the following contents:
1 The civil works of working area, telecommunication room and equipment room have all been completed. The floor of the house is smooth and bright, and the height and width of the door should meet the design requirements.
2 The location, quantity and size of embedded trunking, concealed pipes, holes and shafts of the house shall meet the design requirements.
3 Where the raised floor is laid, the anti-static measures and grounding of the raised floor should meet the design requirements.
Four 220V single-phase power sockets with protective grounding are set in the telecom room and equipment room.
5. The telecommunication room and equipment room should be provided with reliable grounding devices, and the grounding resistance and grounding device settings should meet the design requirements.
The location, area, height, ventilation, fire prevention, ambient temperature and humidity of the telecommunication room and equipment room shall meet the design requirements.
2.0.2 The inspection of the incoming line room and entrance facilities of the building shall include the following contents:
1 The distance between the inlet pipeline and other facilities such as electricity, water, gas and sewage shall meet the design requirements.
2 The laying method of incoming cables shall meet the design requirements.
3 The treatment of pipeline inlet should meet the design requirements, and measures should be taken to drain water to prevent gas, water and insects from entering.
4 The location, area, height, lighting, power supply, grounding, fire prevention and waterproof between incoming lines should meet the design requirements.
2.0.3 The installation method of relevant facilities shall meet the seismic requirements specified in the design documents.
3 inspection equipment and test instruments and tools
3.0. 1 Equipment inspection shall meet the following requirements:
Before construction, the brand, model, specification, quantity and quality of cables and equipment used in the 1 project shall be inspected, which meet the design requirements and are in good condition.
There should be quality certification documents or certificates, and the factory inspection certification materials, quality certification documents or materials inconsistent with the design shall not be used in the project.
Imported equipment and materials shall have the certificate of origin and commodity inspection certificate.
3 The equipment after inspection shall be recorded, and the unqualified equipment shall be stored separately for verification and handling.
Cables and equipment used in the project shall conform to the order contract or sealed products.
Grid, model and grade are consistent.
5. Spare parts, spare parts and various documents shall be complete.
3.0.2 The inspection of supporting profiles, pipes and iron parts shall meet the following requirements:
1 The materials, specifications and models of various profiles shall comply with the provisions of the design documents, and the surface shall be smooth and level without deformation or damage. Embedded metal
The surface coating or coating of trunking, box, junction box and bridge shall be uniform and complete, and shall not be deformed or damaged.
2 When metal pipes or plastic pipes are used for indoor pipelines, the pipe body should be smooth without scars, holes should be free from deformation, and the aperture and wall thickness should meet the design requirements.
The metal pipe groove shall be galvanized or other anticorrosion treatment according to the requirements of the engineering environment. Plastic pipe groove must be flame retardant, and the outer wall should be marked with flame retardant signs.
3 Outdoor pipelines shall be inspected according to the relevant provisions of communication pipeline acceptance.
The materials and specifications of various iron pieces shall meet the corresponding quality standards, and there shall be no skew, distortion, flying thorn, fracture or damage.
The surface treatment and coating of iron parts should be uniform and complete, with smooth surface and no defects such as shedding and bubbles.
3.0.3 Cable inspection shall meet the following requirements:
1 The types and specifications of cables and optical cables used in the project and the fire resistance rating of cables shall match.
Meet the design requirements.
The contents of signs and labels attached to cables should be complete and clear, and the model and specifications should be marked on the outer packaging.
The outer packaging and sheath of cable shall be intact. When the outer packaging is seriously damaged, it should be tested and qualified before it can be used in the project.
4 The cable shall be accompanied by this batch of electrical performance inspection reports. Before construction, the electrical performance and cable length of links or channels shall be sampled and tested.
Test records.
5 After the optical cable is opened, check whether the end packaging of the optical cable is in good condition. If there is any damage to the outer packaging or sheath of the optical cable, optical fiber should be carried out on this optical cable.
Performance index test, if there is fiber breakage, it should be treated and can be used only after it is qualified. After the optical fiber detection is completed, the end of the optical cable should be sealed and fixed.
Restore the outer packaging.
6 Optical fiber jumper or optical jumper inspection shall meet the following requirements:
The end faces of optical fiber connectors at both ends of 1 shall be equipped with suitable protective caps.
2) The type of optical fiber shall meet the design requirements and be clearly marked.
3.0.4 The inspection of connecting devices shall meet the following requirements:
1 The components of connecting devices such as wiring module and information socket module shall be complete, and the electrical and mechanical properties shall meet the production quality of corresponding products.
Quantitative standard. Plastic materials should be flame retardant and meet the design requirements.
2 The indicators of signal line surge protector shall comply with relevant regulations.
3 The use type, quantity and location of optical fiber connectors and adapters shall be consistent with the design.
3.0.5 The use of wiring equipment shall meet the following requirements:
1 The model and specifications of optical cable distribution equipment shall meet the design requirements.
2 The arrangement and logo name of optical and cable wiring equipment should be consistent with the design. The names of all kinds of signs should be unified, and the positions of signs should be correct and clear.
3.0.6 The inspection of test instruments and tools shall meet the following requirements:
1 The instruments and tools needed in the project shall be tested or inspected in advance, and the cable testing instruments shall be accompanied by the certification documents of the corresponding testing institutions.
The test instrument of the integrated wiring system should be able to test various electrical properties and transmission characteristics of the corresponding project, and its accuracy meets the corresponding requirements. measure
The accuracy of the test instruments shall be checked and calibrated regularly according to the corresponding appraisal procedures and calibration methods, and the certificates shall be obtained after verification by the corresponding metrological departments.
After that, it can be used within the validity period.
3 Construction tools, such as optical cable or optical cable splicing tools: wire stripping pliers, optical cable cutting machine, optical fiber welding machine, optical fiber grinding machine, clamping tools, etc.
It must pass the inspection before it can be used in engineering.
3.0.7 When there is no testing means on site to obtain the relevant technical parameters required by the shielded wiring system, the technology attached by the certification testing institution or manufacturer can be adopted.
The surgical report is used as the basis for examination.
3.0.8 The electrical performance, mechanical characteristics, optical cable transmission performance and specific technical indicators and requirements of the connecting device of the twisted pair cable shall meet the design requirements.
After testing and inspection, the equipment and materials whose performance indexes do not meet the design requirements shall not be used in the project.
4 Equipment installation inspection
4? 0? 1 The installation of cabinets and racks shall meet the following requirements:
1 The installation positions of cabinets and racks shall meet the design requirements, and the vertical deviation shall not be greater than 3mm.
All parts of cabinets and shelves shall not fall off or be damaged, and the paint shall not fall off or be scratched. All signs shall be complete and clear.
3 The installation of cabinets, racks, wiring equipment boxes, cable trays, trunking and other equipment shall be firm. If there are seismic requirements, they should be carried out according to seismic design.
Reinforcement.
4.0.2 The installation of various wiring components shall meet the following requirements:
1 All components shall be complete, installed in place and marked completely.
2 The mounting screws must be tightened and the panel should be kept on a flat surface.
4.0.3 Information socket module installation shall meet the following requirements:
1 The installation position and height of information socket module, multi-user information socket and assembly point wiring module shall meet the design requirements.
2 when installed on the raised floor or ground, it should be fixed in the junction box, and the socket panel should be vertical and horizontal; The terminal box cover can be opened,
And should have waterproof, dustproof and compressive functions. The junction box cover should be flush with the ground.
3 When the information socket module and the power socket are installed in the bottom box of the information socket at the same time, their spacing and protective measures should meet the design requirements.
4 The fixing method of the bottom box of the information socket module depends on the construction site conditions.
5 The fixing screws should be tightened, and there should be no looseness.
6 Various socket panels shall be marked with colors, graphics and words to indicate the service type of the connected terminal equipment.
7 The installation boxes of optical fiber connectors and adapters used to terminate optical cables in the work area should have enough space and meet the design requirements.
4.0.4 Installation of cable tray and trunking shall meet the following requirements:
1 The installation position of the bridge and trunking shall conform to the requirements of the construction drawing, and the left-right deviation shall not exceed 50 mm ..
2 The levelness deviation of bridge and trunking shall not exceed 2mm per meter.
3 vertical bridge, trough should be vertical to the ground, verticality deviation is less than 3 mm..
4 Truncation of trunking and splicing of two trunking shall be smooth and burr-free.
5 hanger and bracket installation should be vertical, neat and firm, without skew.
6 metal bridge, trough and metal pipe should be well connected and installed firmly.
7 When laying cables with suspended ceiling support columns, the support points should avoid the positions of ground grooves and trunking, and the support should be firm.
4.0.5 The shielding layer of cabinets, racks and wiring equipment, as well as the grounding body of metal pipes, trunking and bridge shall meet the design requirements and be grounded nearby.
And good electrical connection should be maintained.
5 Cable laying and protection mode inspection
5. 1 Cable laying
5. 1. 1 Cable laying shall meet the following requirements:
1 The model and specification of the cable shall meet the design requirements.
2 The laying mode and spacing of cables in various environments should meet the design requirements.
Cable laying shall be natural and straight, and shall not be twisted, looped or jointed, and shall not be squeezed and damaged by external force.
Both ends of the cable shall be marked with numbers, and the writing on the label shall be clear and correct. Labels should be made of materials that are not easily damaged.
5 Cable shall have allowance to adapt to termination, detection and replacement. Reserved length of twisted-pair cable: 3 ~ 6 cm in working area and 0.5 ~ 0.5cm in telecom room.
2m, and the computer room should be 3 ~ 5m；; The laying path of optical cable shall be laid in trays, and the reserved length shall be 3 ~ 5m. If there are special requirements, the length should be reserved according to the design requirements.
Degree.
6 The bending radius of cable shall meet the following requirements:
1) The bending radius of unshielded four-pair twisted cable should be at least 4 times of the cable outer diameter.
2) The bending radius of shielded four-pair twisted cable should be at least 8 times of the cable outer diameter.
3) The bending radius of trunk twisted pair cable should be at least 10 times of the cable outer diameter.
4) The bending radius of 2-core or 4-core horizontal optical cable should be greater than 25mm; ; The bending radius of horizontal optical cables, trunk optical cables and other outdoor core optical cables shall be
At least 10 times the outer diameter of the optical cable.
7 The minimum clear distance between cables shall meet the design requirements:
1) The power cord and cable of the integrated wiring system shall be laid separately, and shall comply with the provisions in Table 5. 1. 1- 1.
Table 5. 1. 1- 1 Minimum clear distance between twisted-pair cable and power cable
Conditional minimum clear distance (mm)
380 volts & lt2kV? A 380V2~5kV? A380V & gt5kV？ A
The twisted-pair cable is laid in parallel with the power cable 130 300 600.
One side is in the grounding metal channel or steel pipe 70 150 300.
Both sides are grounded metal channels or steel pipes ② 10① 80 150.
Note: When 380V power cable < 2kV? A, when both sides are in the grounding wire groove and the parallel length is ≤ 10m, the minimum spacing can be 10mm.
(2) Both sides are in the grounding wire groove, that is, two different wire grooves, which can also be separated by metal plates in the same wire groove.
2) The minimum clear distance between integrated wiring and distribution box, distribution room, elevator room and air-conditioning room shall comply with the provisions in Table 5. 1. 1-2.
Table 5. 1. 1-2 Minimum clear distance between integrated cable and other computer rooms
Minimum clear distance of name (m) Minimum clear distance of name (m)
Distribution box 1 elevator room 2
Power distribution room 2 air conditioning room 2
3) See Table 5. 1. 1-3 for the minimum clear distance between the buried pipes of power and optical cables in the building and other pipelines.
Table 5. 1. 1-3 Distance between integrated cable duct and other ducts
Clear distance of parallel pipeline type (mm) and clear distance of vertical crossing (mm)
Lightning protection downlead 1000 300
Protective ground wire 50 20
Heat pipe (unpacked) 500 500
Heat pipe (package) 300 300
Water supply pipe 150 20
Gas pipe 300 20
Compressed air pipe 150 20
4) Integrated wiring cables shall be laid separately, and the cable spacing between them and other subsystems of weak current system shall meet the design requirements.
5) For projects with safety and confidentiality requirements, the spacing between the integrated wiring cable and the signal line, power line and grounding line shall comply with the corresponding confidentiality provisions.
For cables with safety requirements, independent metal pipes or metal trunking shall be used for laying.
8 The shielding layer of shielded cable should be kept intact from beginning to end.
5. 1.2 Cable laying in embedded trunking and concealed pipes shall meet the following requirements:
1 Both ends of laying trough and concealed pipe shall be marked with numbers, etc.
2 Metal trunking should be adopted for embedded trunking, and the section utilization ratio of embedded or sealed trunking should be 30% ~ 50%.
3. Steel pipes or flame-retardant PVC hard pipes should be used for laying concealed pipes. Logarithmic trunk cable and optical cable with more than 4 cores are enlarged with straight pipe diameter.
The utilization rate should be 50% ~ 60%, and the curved pipeline should be 40% ~ 50%. When laying 4 pairs of twisted pairs or 4-core and below optical cables in concealed pipes, the pipeline
The utilization rate of cross section should be 25% ~ 30%.
5. 1.3 Cable trays and trunking shall meet the following requirements:
1 The cables in the sealed trunking shall be laid as straight as possible without crossing, and shall be bound and fixed at the parts and corners where the cables enter and leave the trunking.
2 When the cable is laid vertically in the cable tray, it should be fixed at the upper end of the cable and on the tray support every 1.5m; When laying horizontally, in the cable
The head, tail, turn and every 5 ~ 10m of the line shall be fixed.
3 When laying cables in horizontal and vertical bridges, the cables shall be securely tied. Twisted cables, optical cables and other signal cables should be based on the type of cables.
Don't, quantity, cable diameter, cable core bundle binding. The binding spacing should not be greater than 1.5m, and the spacing should be even. It is not advisable to bind too tightly or make the cable suffer.
Squeeze.
On the 4th floor, when the optical cable is laid in the open bridge, a gasket should be installed at the binding and fixing place.
5. 1.4 When the suspended ceiling pillars are used as trunking for laying cables in the suspended ceiling, the cables within the jurisdiction of each pillar can be routed without sealing the trunking.
Wire cloth, but should be bundled, cable should be flame retardant, cable selection should meet the design requirements.
5. 1.5 The technical requirements for the construction of overhead power, optical cable, pipeline, direct burial, wall penetration and underground pipe laying in the building complex subsystem shall conform to the local network communication lines.
Relevant provisions on acceptance of road works.
5.2 Protective measures
5.2. 1 Cable laying protection of distribution subsystem shall meet the following requirements:
1 Protection requirements for embedded metal trunking:
1) The embedded trunking in the building should be set in a single floor, and there should be no more than three embedded trunking in and out of the same box for each route. The section of the trunking is
The height shall not exceed 25mm, and the total width shall not exceed 300mm. If the wiring of trunking includes junction box and outlet box, the section height should be 70 ~
Within l00mm.
2) When the buried length of trunking is more than 30m or the trunking tends to cross and turn, trunking boxes should be set to facilitate cable laying and maintenance.
3) The box cover of the line crossing can be opened and flush with the ground, and the box cover should have dustproof and waterproof functions.
4) The junction box and the box cover of the junction box should be able to withstand pressure.
5) When the cable is connected from the metal trunking to the junction box of the information socket module or between the metal trunking and the metal steel pipe, the metal hose shall be used for laying.
2 embedded concealed pipe protection requirements:
1) The maximum pipe diameter of the embedded concealed pipe in the middle of the wall shall not exceed 50 mm, the maximum pipe diameter of the concealed pipe in the floor shall not exceed 25mm, and the outdoor pipe.
The maximum diameter of the tunnel entering the building should not exceed l00mrn.
2) A wire box device shall be set every 30m for straight pipeline laying.
3) The turning angle of the concealed pipe should be greater than 90. On the path, the turning angle of each concealed pipe shall not exceed 2, there shall be no S-bend, and there shall be a turn.
When the length of the pipe section exceeds 20m, a pipeline box device shall be set; When there are two bends, the junction box should be set when it is not more than 15m.
4) The nozzle of the concealed pipe should be smooth and protected by mouth protection, and the protruding part of the nozzle should be 25 ~ 50 mm ..
5) The nozzles of concealed pipes from the telecommunication room to the floor should be arranged neatly, which is convenient for identification and cable laying.
6) The concealed pipes shall be provided with traction wires or stay wires.
7) When the metal pipe is exposed, it should be fixed with pipe clamps at a distance of 300mm from the junction box and at intervals of 3 m at both ends of the elbow. ..
8) The bending radius of the pipeline turning should not be less than the minimum allowable bending radius of the cable, and should not be less than 6 times of the external diameter of the pipeline, such as outside the concealed pipe.
When the diameter is greater than 50mm, it should not be less than 10 times.
3 Set protection requirements for cable trays and trunking:
1) The bottom of the cable tray is 2.2m away from the ground, and the top is not less than 300mm away from the building floor, crossing with obstacles such as beams.
The distance between them should not be less than 50 mm.
2) When the cable tray is laid horizontally, the bracket spacing should be 1.5 ~ 3m. When laying vertically, the spacing fixed on the building structure should be less than 2m.
The part below 1.8m shall be protected by metal cover plate or encapsulated by metal junction box, and the door shall be openable.
3) When the cable tray in the straight section exceeds 15 ~ 30m or crosses the deformation joint of the building, a telescopic compensation device shall be set.
4) When laying metal trunking, a bracket or hanger shall be set in the following situations: the junction of trunking; 3 m apart; Leave 0.5m sockets at both ends of the wire slot.
Department; turn
5) The spacing between fixed points at the bottom of plastic trunking shall be1m..
6) The turning radius of cable tray and cable trough should not be less than the minimum allowable bending radius of cable in cable trough, and the minimum bending radius of right-angle bend of cable trough should not be less than.
Less than 10 times the outer diameter of the thickest cable in the slot.
7) When the bridge and trunking pass through the firewall body or floor, fire prevention and plugging measures shall be taken after the cable laying.
4 network floor cable laying protection requirements:
1) The trunking shall communicate with each other.
5) The nozzles of concealed pipes from the telecommunication room to the floor should be arranged neatly, which is convenient for identification and cable laying.
6) The concealed pipes shall be provided with traction wires or stay wires.
7) When the metal pipe is exposed, it should be fixed with pipe clamps at a distance of 300mm from the junction box and at intervals of 3 m at both ends of the elbow. ..
8) The bending radius of the pipeline turning should not be less than the minimum allowable bending radius of the cable, and should not be less than 6 times of the external diameter of the pipeline, such as outside the concealed pipe.
When the diameter is greater than 50mm, it should not be less than 10 times.
3 Set protection requirements for cable trays and trunking:
1) The bottom of the cable tray is 2.2m away from the ground, and the top is not less than 300mm away from the building floor, crossing with obstacles such as beams.
The distance between them should not be less than 50 mm.
2) When the cable tray is laid horizontally, the bracket spacing should be 1.5 ~ 3m. When laying vertically, the spacing fixed on the building structure should be less than 2m.
The part below 1.8m shall be protected by metal cover plate or encapsulated by metal junction box, and the door shall be openable.
3) When the cable tray in the straight section exceeds 15 ~ 30m or crosses the deformation joint of the building, a telescopic compensation device shall be set.
4) When laying metal trunking, a bracket or hanger shall be set in the following situations: the junction of trunking; 3 m apart; Leave 0.5m sockets at both ends of the wire slot.
Department; turn
5) The spacing between fixed points at the bottom of plastic trunking shall be1m..
6) The turning radius of cable tray and cable trough should not be less than the minimum allowable bending radius of cable in cable trough, and the minimum bending radius of right-angle bend of cable trough should not be less than.
Less than 10 times the outer diameter of the thickest cable in the slot.
7) When the bridge and trunking pass through the firewall body or floor, fire prevention and plugging measures shall be taken after the cable laying.
4 network floor cable laying protection requirements:
1) The trunking shall communicate with each other.
2) The trough cover plate shall be openable.
3) The width of the main channel should be 200 ~ 400 mm, and the width of the branch channel should not be less than 70 mm ..
4) The openable trunking cover plate shall be connected with the bottom box of the exposed socket through a metal hose.
5) The bottom plate and trough cover plate shall be compressive, impact-resistant and flame-retardant.
6) When the network floor has anti-static function, the whole floor should be grounded.
7) Metal trunking between network floors shall be well connected and grounded.
5 When laying cables under the overhead floor, the clearance in the floor should be 150 ~ 300mm. When the air conditioner adopts downward air supply mode, the clear height in the floor should be
300~500mm。
6 when the power cord and integrated wiring cable in the ceiling support column are laid together, there should be a metal plate in the middle, and the spacing should meet the design requirements.
5.2.2 When the integrated wiring cable and the building weak current system cable are laid in the same trunking or bridge, the subsystems shall be separated by metal plates.
Distance should meet the design requirements.
5.2.3 Cable laying protection mode of trunk subsystem shall meet the following requirements:
1 Cables shall not be laid in elevators or water supply, gas supply and heating pipe wells, and cables shall not be laid in high-pressure wells. .
2 Trunk channels between telecommunication room, equipment room and incoming line should be kept unblocked.
5.2.4 The cable laying protection mode of the subsystem of the building complex shall meet the design requirements.
5.2.5 When the cable enters the building from the outside of the building, an adaptive signal line surge protector that meets the requirements should be selected.
Design requirements.