【 Weak current College 】 trunking sizes and varieties, as well as cable laying

In addition to cable wiring system, the Groove tube is an important component, you can say: the metal Groove, PVC, metal pipe, PVC pipe is the comprehensive wiring system of basic materials. In the comprehensive wiring system used mainly in the area, have the following situation:
1) metal groove and accessories;
2) metal pipe and attachment;
3) PVC plastic Groove and accessories;
PVC plastic pipe 4) and annex.
Are described below.
1. the metal groove and plastic tank
Metal trough the tank bottom and groove lid, each root bad General length is 2 m, Groove and Groove connection using the corresponding dimensions of the plate and screw fixation. Grooved appearance as shown in Figure 1.
Figure 1 Groove profile
In the comprehensive wiring system for the general use of the metal tank specifications are: 50 × 100mm, 100 × 100 × 100mm, 200mm, 100 × 200 × 400mm 300mm, etc. many kinds of specifications.
Plastic tank outer shaped similar to figure 1, but it's more varieties and specifications, technically from model: PVC-25 PVC-20 series, series, series, PVC-25F PVC-30 series, PVC-40 series, PVC-40Q series, etc. Speaking from the specifications are: 20 x 12, 25 × 25 × 12.5, 25, 30 × 40 × 15, 20, etc.
And PVC tank matching accessories are: Yang Kok, corner, direct corner, flat tees, third from left, right, three links, header, Terminal, terminal box (cassette, Ming-boxes). Looks like Figure 2
PVC-40Q plastic trunking installation accessories for laying out (white)

Figure 2 bath accessories

2. metal pipes and plastic pipes
Metal pipe is used in the branch structure or buried lines, it also has a variety of specifications to outer diameter mm units: engineering
Commonly used metals possession: D16, D20, D25, D32, D40, D50, D63, D25, D110 specifications.
In metal tubes stringing cable routing than larger, the choice of metal pipe when you select a larger diameter, General tube filler accounted for 30 per cent for stringing. Metal tube there is also a hose (commonly known as boring skin tube), for bent.
Plastic pipe products are divided into 2 main categories: PE flame retardant pipes and PVE resistance to catheter.
PE flame retardant pipes is a plastic half-hard fibres to the outer diameter is D16, D20, D25, D324 specification. Appearance in white,
With high strength, corrosion-resistant, flexible and smooth inner wall, etc., Ming, concealed thread use it also to spare units, each plate weight is 25 kg.
PVC catheter is, PVC resin as the main raw material, and add appropriate amount of additives, processing equipment extrusion of rigid tube, small diameter PVC pipe can be bent at room temperature. User-friendly, outer diameter: D16, D20, D25, D32, D40, D45, D63, D25, D110 specifications.
And PVC pipe installation matching accessories: connectors, screw ring, elbow, pipe spring; a connection close, two-way connection-and three-way Junction-, four-wire connection, open pipe clamp, special cutting pipe, PVC blister agents, etc.

3. tray
Bridges are wiring industry a term that is building wiring an indispensable part. Cable Tray is divided into ordinary cable tray, heavy cable tray, trough the cable tray. In the common cable tray also can be divided into ordinary bridge, straight edge common cable tray.
In the common cable tray, there are the following main parts for combinations:
Ladder racks, siphon, tees, section II, convex, concave curved siphon, increase the plates, side plates, to fit width adjustment plate, vertical corner pieces, coupling plate, square corner connection plate, isolation, plates, etc.
In pass-through ordinary bridge has the following main parts for combinations:
Ladder racks, siphon, tees, section II, convex, concave curved siphon, cover, siphon cover, three cover, four-door, convex curved circular flat, concave curved through the tray cover, flower, flower hole holes siphon, flower hole four-way pallets, coupling plate vertical corner join pulling, Xiaoping corner connection Board, end-to-join Board of Nursing Board, isolation panels, siding panels, end the bezel.
Heavy cable tray, slotted tray in the network cabling is rarely used, so it is no longer narrative.

4. the tank, pipe laying of cables
Groove cable laying there are 4 methods.
1. the use of cable tray or trunking and embedded key combination of tube
1) cable tray to high above the ground, cable tray top 2.2m from ceiling or other obstructions shall be not less than the width of the cable should not be 0.3m is smaller than the cable cross-section 0.1m fill rate within should not exceed 50 per cent.
2) in the cable tray inner cable laying vertically, in the upper end of the cable should be fixed for each interval 1.5m left bracket of the bridge; horizontal installation, the first in the cable, tail, turning each interval 2 ~ 3m for fixed.
3) cable trunking to higher ground 2.2m. Set in the ceiling, the slot cover open surface should maintain 80mm overbridges, trunking cross-section utilization should not exceed 50 per cent.
4) horizontal cabling, cloth placed online slot cable can not binding, Groove cable should be straight, try not to cross, not the cable
Should overflow trunking, trunking in cable access, corner should be lashing. Vertical wire cloth cable should be fixed for each interval 1.5m bracket in the cable.
5) in the horizontal, vertical tray and the laying of lines in the vertical flutes, binding deal with cables. Fastening spacing should not be greater than the spacing 1.5m, buckle should be uniform, moderate elasticity.
Embedded steel pipe as shown in Figure 4, it combines the layout of the location or area.

Figure 4 cable tray or trunking and embedded steel pipe with the manner in which
Set cable tray and cable trunking support
Protection requirements:
1) bridgeFrame level laying between the support
Distance 1 ~ 1.5m, vertical installation in buildings on spacing should be less than 1.5m.
2) trunkings laying, you set the bracket or hanger: trunking connector; spacing 1 ~ 1.5m; leave the two port trunking; turn 0.5m corner.
3) plastic trunking base fixed spacing General 0.8 ~ 1m.
2. embedded trunkings support protection mode
1) embedded in the building in different sizes, the trunking Visual by one or two layer settings should be at least two embedded above, should not be more than the trunking 25mm sectional height.
2) trunking buried should less than 6 m in length or on-line slot router cross, changing the times set la box, so that the cloth cabling and maintenance.
3) La box cover should be open and flush with the ground, the cover should take waterproof measure.
4) trunking use metal tube into the junction box.
5) embedded trunkings method as shown in Figure 5.

Figure 5 embedded trunkings way map
3. embedded dark pipes protection
1) Dim tube use metal pipe, embedded in the wall in the middle of a dark inner diameter of not more than 50mm pipe; floor in the dark pipe inner should 15 ~ 25mm. In straight tubing 30m Department should set the black-box and other devices.
2) Dim turning angle pipe should be greater than 90 ° c, on the path of each dark tube turning point not more than two, and should not have the S bend. Pipe bending cloth, in each interval 15m Department should set the dark line boxes, and other devices.
3) dark tube change the radius of curvature of not less than 6 times the outer diameter, such as dark outer diameter greater than 50mm, should not be less than 10 times.
4) dark tube should be smooth and have insulation sleeving, spout out parts should be 25 ~ 50mm. Spout out parts of the request as shown in Figure 6.
Figure 6 dark tube export parts installation diagram
4. a lattice trunking and Groove combination of protection
1) grooves, and Groove to communication lattice.
2) Groove cover can be opened, and flush with the ground, the cover and the socket outlet shall take waterproof measure.
3) width of the Groove should be less than 600mm.
4) lattice trunking and grooves of the form as shown in Figure 7.

Figure 7 lattice trunking and Groove component diagram
5) laying floor laying cables, activities within the floor should not be less than clear, movable floor 150mm if as a ventilation system of ducts, the floor should not be less than the height measured 300mm.
6) adopting the common column as a ceiling-mounted support, you can put in a column in the columns support the cable should be avoid trench and line slot
Reset, support should be secure. Public post routing method as shown in Figure 8.
Figure 8 public post cloth wire cable way map
7) different types of cable wiring in metal tank should be separated with the Groove (separated with a metal plate) cloth. Trunkings earthing should meet the design requirements.
Cable laying route subsystem supports protection should meet the following requirements:
The cables shall be the Chief buildings on the elevator, or pipe shaft.
Trunk channel between buildings.
? In cable shaft through each floor should be rectangular or circular holes. Rectangular holes size should not be less than 300 × 100mm;
Circular openings should be at least three circular pipe installation, pipe diameter not less than 100mm.
8) in the workspace information point and cable laying pending cases, or in the workspace using the carpet under the cloth cable is working sets the transfer box quyi, each transfer box service about 80cm2.