Fixed support points shall be set within 500mm at both ends of the cable tray entering and leaving junction box, box, cabinet, corner, turning and deformation joint and three ends of T-joint. It is forbidden to cut supports and hangers by electric welding; It is strictly forbidden to fix supports and hangers with wooden bricks.
Cable tray installation:
4.1 when the cable tray is installed horizontally, the support span is generally 1.5-3m, and when it is laid vertically, the distance between fixed points is not easy to be greater than 2m.
4.2 the cable tray shall be flat without distortion, burr on the inner wall and complete with various accessories
4.3 the interface of cable tray shall be flat, and the joint shall be tight and straight. The slot cover should be flat without warping angle after installation, and the outlet position should be accurate.
4.4 when laying in the ceiling, if the ceiling can not be accessed, manhole shall be reserved.
4.5 the iron parts of all non-conductive parts of cable tray shall be connected and bridged to form a continuous conductor, and the whole grounding shall be well done; Braided copper wire is used for grounding bridging between each cable tray.
4.6 when the cable tray passes through the deformation joint of the building, the cable tray itself should be disconnected, and the connecting plate should be used in the slot to lap without fixing. The protective earth wire and the conductor in the slot shall have compensation allowance. The steel bridge in straight line section should conscientiously implement the rules and regulations of safe construction, strengthen the management of construction personnel, implement the technical measures of safe construction, check and urge the construction personnel to work safely, so as to achieve safe and civilized construction.
1.2 organize the construction personnel to study the construction standards and be familiar with the construction drawings, carry out the construction in strict accordance with the design and relevant regulations, specifications and standards, check the construction quality at any time, and rectify the problems in time.
1.3 the scaffolds erected on the construction site and the electrical, mechanical equipment and safety protection devices used on the construction site shall comply with the relevant safety regulations and be accepted before use.? The construction personnel shall abide by the following regulations during the whole construction process:
2.1 it is necessary to abide by and implement the relevant management system of safe production and civilized construction, and accept the inspection and supervision of the supervision personnel of the construction unit. Safety helmet must be worn to enter the construction site, and safety belt must be fastened when working at height.
2.3 when working in the control room and switch room, the supervisor must be present and work under the condition of power failure. Take off the watch, key, lighter, pen and other metal articles, and wear insulating gloves and shoes.
2.4 if it is necessary to arrange and discharge the cables, the consent of the supervisor shall be obtained in advance, and the arrangement shall be carried out under the supervision of the supervisor.
2.5 after the completion of construction, the construction site shall be cleaned up.
Safety construction management system
1. In and out of the work area must register the time, number and work content.
2. Construction personnel shall wear work cards, safety helmets and work clothes when entering the construction site.
3. Smoking is strictly prohibited when entering the work area for construction.
4. The live working area must be allowed to wear insulating gloves and shoes when working.
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