Laboratory electrical engineering construction technology
electrical engineering construction technology
distribution line laying, cable tray and pipeline laying should be horizontal and vertical, firm and beautiful, all metal trunking, pipes and boxes should be grounded; each metal trunking, line pipe, and threading port must be installed after the mouth guard Re-thread the wires; the strong and weak current cables must be laid separately, if limited by conditions...
Text label: laboratory design, laboratory engineering, electrical engineering construction technology
Electrical Engineering Construction Technology
distribution line laying, cable tray and pipeline laying should be horizontal and vertical, firm and beautiful, all metal trunking, pipes and boxes should be grounded; each metal trunking, line pipe, and threading port must be installed after the mouth guard Re-thread the wires; the strong current and weak current cables must be laid separately. If limited by conditions or when the number of one party is small, it can be laid in a wire trough. The strong current is on the bottom and the weak current is on the top, and certain isolation measures should be taken; When connecting through the deformation seam of the building, there should be a grounding compensation device. The welded steel pipe adopts Φ6 round steel as the grounding jumper.
In-pipe threading construction procedures: construction preparation → selection of conductors → threading and pulling → cleaning of pipelines → laying off and disconnection → binding of conductors and tapes → with guards → conductor connection → conductor welding → conductor wrapping → line inspection insulation shake The wire of each circuit should be selected in strict accordance with the design drawings, and the phase wire, neutral wire and protective ground wire should be distinguished; Meet the design and construction drawing requirements; after the piping is completed, all the pipelines must be cleaned before threading. The purpose of cleaning the pipeline is to remove dust, mud and other debris in the pipeline. Before threading, check whether the guards of each nozzle of the steel pipe are complete. If there is any omission or damage, it should be filled and replaced; Place the wire on the pay-off stand or on the pay-off cart, and do not drag the wire on the ground at will; when cutting the wire, the reserved length of the wire in the junction box, switch box, socket box and lamp box is 15cm, and the pre-wired length of the wire in the distribution box is 15cm. The length is 1/2 of the circumference of the distribution box. The trunk line is at the branch, and it can be directly used as a branch connector without cutting the wire. Zhongjing Global Purification can provide consulting, planning, design, construction, installation, transformation and other supporting services for laboratories and sterile rooms.
wire joints cannot increase the resistance value, and the stressed wires cannot reduce the original mechanical strength and the original insulation strength; when the wires are electrically connected, the insulation must be cut off before connecting, and the multi-strand wires need to be tinned or Crimping, wrapping the rope; the wires of the same AC circuit must be passed through the same tube, and the wires of different circuits, different voltages, and AC and DC must not be passed into the same tube; the wire is at the deformation seam, the compensation device should move freely, the wire There should be a certain margin; after the wiring inspection, welding, and packaging are all completed, self-inspection and mutual inspection should be carried out to check whether the wire connection, welding, and packaging meet the design requirements and the relevant construction acceptance specifications and quality inspection standards. Those that meet the requirements should be corrected immediately, and the insulation shake test can be carried out only after the inspection is correct. Generally, 500V is used for the wire insulation shake test, and the shaking speed should be kept at about 120r/min. The reading should be taken after one minute. Lamp installation and construction procedures: construction preparation → inspection of lamps and lanterns → fabrication and installation of lamp supports and hangers → lamp installation → power-on test lighting; lamps of various specifications and models include fluorescent lamps, evacuation instructions, etc., exit indicators, signs, light boxes, etc., according to the lamps and lanterns The installation of lamps and lanterns is divided into embedded installation, ceiling installation, steel frame installation, embedded wall installation, hanging installation, bracket installation, etc.
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