Technical support content cable tray installation instructions
Means a cable ladder cable tray, cable trays and metal trunking.
Cable bridge are mainly steel, aluminum and glass system, steel and so on. Surface treatment of steel bridge is divided into painting, spray, electric galvanized, hot galvanized, powder electrostatic spraying process.
The installation of cable tray are mainly installed along the roof. Along the wall the horizontal and vertical installation, along the shaft installation, along the floor to install. Along the cable trench and pipe installation bracket. Installation with the support (hanging) frame can be finished or made optional. Branch (hanging) frame fixation methods are mainly embedded iron pieces welded, bolted, etc. expansion.
Lifting metal trunking mainly used for indoor lighting installation.
During the construction according to the approved design, the general requirements are as follows.

1. Metal trunking wiring
(1) metal trunking for wiring to move a normal indoor environment dry and less susceptible to mechanical damage of the sites for surface, but have serious corrosion of metal trunking place should not be used.
(2) The same loop all the phase lines and neutral lines should be laid in the same metal trunking. The same path of non-tamper-resistant requirements of lines, can be laid in the same metal trunking, the trunking of the total cross-section wire or cable (including the outer protection layer) should not exceed 20% of the trunking section, not more than 30 current-carrying wires root. Control, signal or with similar lines, wires or cables should be more than the total cross-sectional groove within the cross-section down to 50% of the minimum number of wires or cables roots.
(3) Metal trunking vertical or inclined installation, should take measures to prevent the wire or cable line tank movement.
(4) arising from metal trunking lines, can be used metal tube, rigid plastic tube, semi-rigid plastic pipe, metal hose, or cable wiring methods. Wire or cable may be subjected to damage some of the leads.
(5) line bad to be flat, no distortion, walls should be smooth, no glitches.
(6) metal trunking or access should be a reliable ground zero, but not as an equipment grounding conductor.
2, cable tray routing
(1) in the indoor use of cable tray routing, its cable there should be easy to delay ignition of jute or other material outside the sheath.
(2) in a humid place where corrosion or special use of cable tray routing, should be based on the different corrosive media, take appropriate protective measures, and should use plastic sheathed cables.
(3) Cable tray (tray) level from the ground when installed in general should not be less than the height of 2.50m, to 1.80m vertically installed the following parts from the metal should be added to cover protection, but laying in electrical rooms (such as with electrical rooms, electrical shaft, technology level, etc.) except when inside.
(4) the level of cable tray installation, according to load curve should select the best span to support span is usually 1.5 ~ 3m. Vertical installation, its fixed-point pitch should not be larger than 2m.
(5) groups of cable tray installed at the same level in parallel, each between adjacent cable tray should be considered maintenance, overhaul distance.
(6) In cable tray can be no distance between the laying of cables, cable bridge in cross-section of the Fill Rate: power cable should not be greater than 40%; control cable should not be greater than 50%.
(7) The following different voltage, different uses of the cables, not laid on the bridge on the same level:
1) lkV above and below the cable 1kV.
2) the same path to a load power of the dual power cable.
3) Emergency lighting and other lighting cables.
4) The electric and electronic cables.
Who is subjected to conditions to be installed on the same level when the bridge, the application partition separated.
(8) cable tray with a variety of channels in parallel or cross, the minimum spacing should be consistent with the requirements in Table DQ4-1.
(9) cable tray should not be installed in corrosive gas pipes and heat pipe at the top and bottom of corrosive liquids pipelines, or should be taken to anti-corrosion, heat insulation measures.
(10) inside the cable tray cable shall be carried out in the following parts of the fixed. Vertical laying, the cable top and at intervals of 1.50 ~ 2m. The level of laying, the cable head, tail ends, turn, and at intervals of 5 ~ 10m. Cable tray with a variety of channels the minimum spacing in Table DQ4-1 pipe type parallel spacing (m) Cross-spacing (m) the general process piping 0.40.3 has a corrosive liquid (or gas) Pipeline 0.50.5 heat pipe has 0.50.5 No insulation layer insulation 1.01.0
(11) cable tray cable shall be within the first end, tail, turn, and at intervals of 50m, there is no number, type and date, only the points, and so marked.
(12) cable tray that runs through the firewall and fire floor when the fire should be taken to quarantine measures.