Integrated wiring four types of cable to meet the normal indoor wiring

Source: Internet
Author: User

Integrated wiring system emerged

Architectural pursuit of integration, intelligence, broadband, personalized information and communication network, integrated wiring System (PDS) emerged. With the rapid development of FTTB and FTTH technology, the indoor cable has been widely used in the building integrated wiring system (including horizontal and vertical wiring system).

because of the special environment of indoor application, the indoor optical cable maintains very good flame retardancy, mechanical characteristic and optical transmission characteristic, also must satisfy the international standard to the toxicity, the corrosivity and the low smoke degree request. In the vertical system, the communication applications of the cable in the horizontal system, the small space application and the optical fiber to the desktop application, the communication application of the high pressure inflatable space have different requirements for the indoor cable. How to choose the right cable to meet the needs of different indoor applications?

Indoor Optical Cable to choose the tight sleeve fiber

at present, most of the indoor optical cable using a tight-sleeve fiber or single core cable as the basic unit, Aramid yarn to strengthen the use of flame-retardant or not to burn the sheath of soft cable. There are also plastic optical fiber as indoor wiring cable, but the product has not been widely used.

Advantages of
Tight sleeve fiber Design: Compact sleeve and optical fiber into one, provide a good mechanical protection, so that optical fiber in the end of the performance of a very good compression and bending; good softness and toughness, small bending radius; good environmental protection, improve the service life of fiber; excellent moistureproof function The tight sleeve buffer layer is easy to peel to the light core, compatible with all kinds of standard connectors, simplifies the termination procedure and lowers the termination cost.

and loose casing design comparison, loose casing using ointment on the fiber to buffer and moistureproof effect, and ointment is not fire-resistant. This is far from meeting indoor fire safety requirements. Moreover, the flame spreads along the optical cable, which extends the degree of damage to the wall and into the deep pipe. In the installation, the need for a large number of cleaning materials and spend a lot of grease cleaning time, at the same time need to use the means of continuous, material costs greatly increased. and the indoor optical cable's tight sleeve optical fiber design and flame retardant or not to burn the sheath makes the indoor optical cable completely conforms to the indoor safety application request. (Triple Tutorial)

used in indoor cable protection materials have PE, PVC, polyurethane, low smoke halogen-free material, flame-retardant PE and so on. The indoor optical cables of different protective materials can be applied to different environments. As a result, indoor high performance communication transmission applications generally adopt a tight set of optical fiber designed indoor cable.

Application and selection of
indoor optical cable

(i) Vertical lift cable (riser)

after the optical cable enters the building, needs to provide the entrance equipment, the equipment room or the computer room and the different floor communication cupboard connection, called "The vertical wiring system". At this point, cabling many cables located in the floor between the vertical pipe (Riser). To do this, optical cables need to withstand greater tensile (the most deadweight).

(ii) single-core, dual-core interconnect indoor cable (interconnectcable)

tight sleeve single core, tight sleeve 8 words double core, tight set 2 core ~4 core round structure indoor optical cable because of the use of a very good flexibility of the tight sleeve structure and high bearing aramid yarn around the tight set of fiber, optical cable structure small, soft, can withstand a very small bending radius, no inventory traces, is fiber to workstation, communication cabinet plug wiring, Tail fiber, jumper, communications cabinet to the interior wall of the extraction end, the end to transceiver applications such as interconnect cable ideal choice. They are directly with standard connectors, in the communications cabinets, distribution boxes, protection boxes, equipment boxes in the optical end of equipment and the backbone (vertical) cable between the role of interconnection. This type of cable is convenient and easy to be installed in the limited space, and it is an ideal network cable scheme for limited space wiring and connecting cords in buildings.

(iii) gas-filled environment with optical cable (plenum)

in indoor applications, the use of plenum-level indoor optical cables is required when optical cables need to pass through pipelines, high-pressure inflatable spaces or air handling systems to convey information. This special environment has made more stringent requirements for the flame retardancy and corrosion resistance of optical cables. Therefore, the use of indoor optical cable tight sleeve materials and external protection materials more stringent, tight sleeve for PVC material, external sheath material for UL-certified add flame retardant PVC material or hard fluoropolymer. The design of PVC is better than fluorine-containing polymers. Because PVC soft, easy to bend, no inventory traces, can be circled storage.

(iv) Anti-rat-type optical cable

using stainless steel hose protection of single core or multi-core optical fiber optic cable has the ability to withstand lateral pressure, bending, tensile strength, high performance of rodent control. It can be used for situations where a stampede occurs, such as laying under a rug or a limited space that needs to be bent often or where there are rodents.

In addition, there are several matters: first, when the use of optical fiber ribbon cable into the building, it can be selected with its supporting indoor optical fiber ribbon cable (fiber band + Aramid Yarn +PVC sheath structure). Second, in the equipment between the underground pipeline, ceiling laying, can be used to strengthen the structure, such as in the distribution cable based on PE, PU sheath or in the diffuse cable structure based on the use of aluminum-PE jacket structure. Third, the distribution cable using metal armored sheath can be used for overhead and directly buried laying. Four is in the toxicity and smoke degree requirements of the occasion, can use low smoke halogen-free (LSZH) materials to do outside the sheath. Five is the use of PU sheath with good resistance to friction, scratches and chemical erosion and other properties, can be used for emergency, repair and military cable.

Vertical Lifting Cable

Wiring Cable (distributioncable) by a number of tight sets of fiber-optic twisted, aramid yarn around the reinforcement, PVC for the outer sheath of the indoor cable suitable for indoor wiring, can be used as a tail fiber, jumper and equipment transmission line between. It starts from the basement, along the floor between the shaft (Riser) up, to the floor of the protective box of the rack, through the tail fiber inserted into the box panel, and then through the double head with a standard connector plug wiring and terminal equipment connected. This cable has very good softness and is easy to work in a communications cabinet. When the PE sheath is used, the optical cable can also be used in the bay and pipe of the building.

Diffuse indoor Cable (breakoutcable)

by a number of single core cables (sub-cables), PVC for the outer sheath of the indoor cable, we are accustomed to call the diffuse type of cable. It is characterized by that each of the sub cables (with Aramid yarn reinforced) for the optical fiber provides a good protection, the sub-cables do not need to enter the protection box, can be used directly branch. It starts from the basement, along the floor between the shaft (Riser) up, to the floor equipment box, each of the cables through the connector directly connected to the device. This kind of cable can also be placed in the ceiling level of the computer room.

Cable Group Indoor Cable (subgroupcable)

multiple sub-cable group (wiring cable) stranded composite cable, PVC for outer sheath of the sub-cable group indoor cable is the biggest feature of each of the sub-cable groups can be used, each of the sub-cable groups into the floor of different protection boxes. Each protection box corresponds to a different working field in the room. When there is a hybrid fiber in the cable, it can be effectively differentiated and separated using multimode fiber and Single-mode fiber in different sub cable groups. When the optical cable needs to cross the protection box and directly connected with the terminal equipment, but also by the combination of a single core cable group structure, the fiber provides a better protection.

Indoor integrated wiring of the four types of optical cable for everyone to introduce finished, I hope you have mastered and understand, we will continue to introduce the relevant knowledge in future articles.

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