【 Weak current College 】 cabling systems engineering construction site coordination and control

Construction content overview
Structured cabling system is composed of workspace subsystem, horizontal cabling subsystem, management zone subsystem, vertical link subsystem, device subsystem, complex subsystems 6 parts.
Comprehensive wiring system's task is to complete the building or complex internal transport network between. Its transmission network is composed of high-quality standard cables and related hardware components of the transmission channel. It can make a building or complex internal voice, video and data communications equipment, and information exchange unit of interchange, at the same time to be building communication network equipment and external communication network equipment one interchange. Also the building automation management and other management systems, through the communications protocol interface, centralized management, intelligent building of the central management of the nervous system.
Cabling the subsystem's contents:
(1) workspace subsystem: workspace subsystem by various room information outlets and socket connection information to the terminal equipment of the cable. Data and voice systems generally use MPS100E-262 Super five types of modular information outlet. This selection provides you with maximum flexibility to ensure that all information point performance parameters of consistency throughout users can freely select an information point for data or voice application. In accordance with the requirements set a hole to four-hole socket, used in computer systems and communication systems.
(2) level of the subsystem: horizontal system layout on the same floor, level one end of the branch line route received in information outlets, the other end of the route followed in building wiring between the jumper shelf, it is the horizontal line extends to the user's workspace. Horizontal lines can take four to hyper-v 1061004CSL class unshielded twisted pair, used for data or voice transmission. When the user requests the broadband transmission, you can use the "fiber to the desktop".
(3) management subsystem: management subsystem is vertical and the horizontal line of route subsystem subsystem of bridges, is mainly responsible for the management zone in the same layer information channel networking and unified management of network devices, placed in different layers are located for distribution. Copper distribution frame general elections with Hyper-v class distribution frame 100AB2-100FT, the distribution frame easy jumper management, beautiful and practical, installed in the floor of the vertical distribution box; fiber distribution frame General selection 100A3 optical fiber interconnect units, installed in the floor of the vertical distribution box. When terminal equipment location or LAN structure changes, as long as you can change the jumper.
(4) vertical lines subsystem: vertical lines between the subsystem consists of the master device (such as computer-controlled machine room, programmable switch room) to all levels of management, the use of large logarithms cable feeder or optical cables, both ends are terminated at equipment and management of jumper shelf, as buildings provide vertical trunk cable routing. Voice part generally use three types of 25 on 1010025AGY large log-twisted pair, according to a speech points correspond to configure a link and leave allowance, if necessary, you can also support the low-speed data transmission, data section generally use LGBC-006D-LRX six-core indoor multi-molds optical fiber, can support up to Gigabit network application and set aside a backup fiber core.
(5) device subsystem: device subsystem uses the card received type distribution frame connection of host and network devices. It is the entire wiring systems Center unit, the equipment in the cable, connect a jumper framework and related supporting hardware, lightning protection equipment, etc. On its cable, cloth selection and environmental conditions, have a direct impact on the future functioning of information systems and the maintenance and use of the flexibility, the best option is to put the computer room, program-controlled switch between the housing and equipment set up in the same floor, and simple to manage, and save investment.
(6) complex subsystems: complex subsystem from an overhead or underground cables and pipelines (buried) in the laying of cables and cables for each outdoor connectivity, multiple buildings of data communication signal integrated wiring system. At the same time, in order to prevent lightning over-voltage, cable enters the building Department, sets the surge voltage protection devices.
Construction site coordination points
1. construction and civil engineering in the outdoor complex
(1) complex subsystems outdoor works, mainly cable and fiber-optic cable laying. Outdoor cable laying a stanchion cableway, laid along the cable trenches, laying of underground cables and pipelines, buried cable laying, etc. The laying process and construction method and the civil suit, as described in the electrical engineering technology related content, will not be repeated here.
(2) outdoor optical fiber cables and building location hand hole well OK: according to the design requirements, other than from the exterior wall disperses water, set 50cm 60 ~ 80cm diameter of wellhead, depth typically ± 0 following 50cm and wall cable through the place setting casing, also require construction in hand hole well set a cast iron shaft ring and shaft cover.
(3) hand-hole casing, for cable through the application of Yau Ma winding pipe and cable between the slit, then it is tight with asphalt sealing paste, prevent the infiltration of rainwater.
2. construction and civil engineering structures with
(1) cable wall casing with the construction of civil structure, based on construction drawings to determine the elevation, coordinates, bushing embedded.
(2) the weak electricity system grounding wire, such as natural grounding, when the structure of the Foundation, in grounding connection Board, PVC plastic tube into the weak electricity grounding wire, with the structure construction led to weak power room, such as cabling equipment room, computer room of the ground distribution box. If the ground should have special requirements, according to the design requirements and provisions of the construction.
(3) covert distribution piping and box (carton), based on construction drawings of coordinates, elevation, with civil engineering structures walls, floors, floor construction.
(4) cooperate with the civil construction, reserved shaft hole, the hole wiring boxes, embedded hanging bracket iron.
3. the renovation works and civil engineering construction
(1) ground trunkings and information outlets (waterproof) construction, be aware of the floor slab thickness, layer thickness (generally should not be less than 6.5cm); at the same time understanding what kind of ground decoration materials such as stone and terrazzo floors, combined with civil construction, andSurface play line positioning, laying trunkings connection information outlets, timely burying decorative surface construction, adjustment of trunkings flatness and information outlets location and surface smoothness.
(2) in light steel keel plate in wall concealed pipeline and information outlet box (generally use 86-boxes), in civil seal wall Board, based on construction drawings to preflight, qualified civil seal after notification of wall panels.
(3) in the ceiling in the piping or wiring trunkings, due to the suspended ceiling in the professional lines converge and prone to collide with each other, need to be coordinated by the total package that pipeline laying adjustment programmes determined after construction.
(4) activities under the cable laying the floor, there are two types:
1) normal activities floor height is 30 ~ 50cm;
2) simple movable floor height of 6 ~ 20cm;
Through the activities of the space below the floor, do you have a pretty good idea for construction of cable, while at the same time determine the cable laying method and anti-static, determine grounding line of construction method.
(5) vertical rack and cable laying, construction in shafts plaster spraying paint finish, door lock was completed, with better, more comprehensive wiring and construction.
(6) the equipment room walls, floors, roof waterproofing, doors and Windows, construction wet job completed, and then apply the cabling equipment into the device, device installation.
Construction site control focus
(1) audit integrated wiring project construction drawings by have the legal qualification of design unit design, confirm construction drawings to be used effectively.
(2) integrated wiring construction drawing key audit system diagram and layout plan layout of information outlets point numbers quantity consistent, whether the omission, or structural changes, the quantity is not doing information outlets.
(3) by carefully reading the comprehensive wiring construction plans, find the cable line and other professional issues such as touch, the findings set summary, available to design units, organization design gives the low-down, put questions to form a solution file, to be checked to confirm, and prompt procedures for design changes.
(4) integrated wiring project audit:
1) complex outdoor project construction method of optical cable, and out buildings, well, external walls.
2) integrated wiring project construction materials and equipment used for processing orders for planning, workforce scheduling, construction schedule, and so should the General and civil engineering construction schedule, make sure that the total duration progresses smoothly conclusion.
3) integrated wiring construction technology gives the low-down: the key is how to cope with the professional civil engineering and construction, cable ducts, box (carton) installed and the laying of the way be aware; specifically, jumper cables, connect the operational requirements and considerations; whether fire, anti-static, anti-EMI, grounding measures.
4) cabling debuggers and test methods, how to meet the existing standards and specifications.
5) optical fiber cable connector connecting when security requirements:
① the fibre-optic cable is made of quartz glass fibers, hard, brittle easily broken, so in the subsequent production should prevent the collapse of the eye.
② fiber exposed part of a live, direct to the naked eye can not see or touch the hands to prevent personal injury accidents.
③ the operations staff must wear glasses and gloves and overalls, away from the crowd and keep the environment clean.
④ does not allow the use of optical instruments to watch powered by Fibre Channel devices.
⑤ only disconnect all light circumstances, to optical transmission system for maintenance operations.
6) integrated wiring grounded best use insulated conductors to device, ensure that no potential difference on Earth wire.